2600787555840 has 320 divisors, whose sum is σ = 8445685102272. Its totient is φ = 682672128000.

The previous prime is 2600787555829. The next prime is 2600787555857. The reversal of 2600787555840 is 485557870062.

It is a tau number, because it is divible by the number of its divisors (320).

It is a super-2 number, since 2×2600787555840² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134182950 + ... + 134202330.

Almost surely, 2^{2600787555840} is an apocalyptic number.

2600787555840 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 2600787555840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4222842551136).

2600787555840 is an abundant number, since it is smaller than the sum of its proper divisors (5844897546432).

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

2600787555840 is a wasteful number, since it uses less digits than its factorization.

2600787555840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19681 (or 19665 counting only the distinct ones).

The product of its (nonzero) digits is 18816000, while the sum is 57.

The spelling of 2600787555840 in words is "two trillion, six hundred billion, seven hundred eighty-seven million, five hundred fifty-five thousand, eight hundred forty".