156520763648 has 72 divisors (see below), whose sum is σ = 342215821080. Its totient is φ = 71116881920.

The previous prime is 156520763627. The next prime is 156520763657. The reversal of 156520763648 is 846367025651.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8166375424 + 148354388224 = 90368^2 + 385168^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 156520763648.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493883 + ... + 746298.

It is an arithmetic number, because the mean of its divisors is an integer number (4752997515).

Almost surely, 2^156520763648 is an apocalyptic number.

It is an amenable number.

156520763648 is an abundant number, since it is smaller than the sum of its proper divisors (185695057432).

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

156520763648 is a wasteful number, since it uses less digits than its factorization.

156520763648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240243 (or 1240229 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 156520763648 in words is "one hundred fifty-six billion, five hundred twenty million, seven hundred sixty-three thousand, six hundred forty-eight".