265623238754940 has 384 divisors, whose sum is σ = 844620418252800. Its totient is φ = 62303937696000.

The previous prime is 265623238754921. The next prime is 265623238754983. The reversal of 265623238754940 is 49457832326562.

265623238754940 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×265623238754940² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 20278124511 + ... + 20278137609.

It is an arithmetic number, because the mean of its divisors is an integer number (2199532339200).

Almost surely, 2^{265623238754940} is an apocalyptic number.

265623238754940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265623238754940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422310209126400).

265623238754940 is an abundant number, since it is smaller than the sum of its proper divisors (578997179497860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265623238754940 is a wasteful number, since it uses less digits than its factorization.

265623238754940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21366 (or 21342 counting only the distinct ones).

The product of its (nonzero) digits is 522547200, while the sum is 66.

The spelling of 265623238754940 in words is "two hundred sixty-five trillion, six hundred twenty-three billion, two hundred thirty-eight million, seven hundred fifty-four thousand, nine hundred forty".