52155621506 has 16 divisors (see below), whose sum is σ = 79184939904. Its totient is φ = 25760712624.

The previous prime is 52155621499. The next prime is 52155621601. The reversal of 52155621506 is 60512655125.

It is a self number, because there is not a number n which added to its sum of digits gives 52155621506.

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, 2867216 + ... + 2885348.

It is an arithmetic number, because the mean of its divisors is an integer number (4949058744).

Almost surely, 2^52155621506 is an apocalyptic number.

52155621506 is a deficient number, since it is larger than the sum of its proper divisors (27029318398).

52155621506 is a wasteful number, since it uses less digits than its factorization.

52155621506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35545.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 52155621506 in words is "fifty-two billion, one hundred fifty-five million, six hundred twenty-one thousand, five hundred six".