51652776240 has 240 divisors, whose sum is σ = 194933898432. Its totient is φ = 12161673216.

The previous prime is 51652776181. The next prime is 51652776257. The reversal of 51652776240 is 4267725615.

51652776240 is a `hidden beast` number, since 5 + 16 + 5 + 2 + 7 + 7 + 624 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 95314 + ... + 335246.

Almost surely, 2^51652776240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51652776240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97466949216).

51652776240 is an abundant number, since it is smaller than the sum of its proper divisors (143281122192).

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

51652776240 is a wasteful number, since it uses less digits than its factorization.

51652776240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239988 (or 239979 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 51652776240 in words is "fifty-one billion, six hundred fifty-two million, seven hundred seventy-six thousand, two hundred forty".