162651322521 has 6 divisors (see below), whose sum is σ = 234940799210. Its totient is φ = 108434215008.

The previous prime is 162651322517. The next prime is 162651322523. The reversal of 162651322521 is 125223156261.

162651322521 is a `hidden beast` number, since 1 + 62 + 6 + 51 + 3 + 22 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 88408696896 + 74242625625 = 297336^2 + 272475^2 .

It is not a de Polignac number, because 162651322521 - 2² = 162651322517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162651322523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9036184576 + ... + 9036184593.

Almost surely, 2^162651322521 is an apocalyptic number.

It is an amenable number.

162651322521 is a deficient number, since it is larger than the sum of its proper divisors (72289476689).

162651322521 is a wasteful number, since it uses less digits than its factorization.

162651322521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18072369175 (or 18072369172 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

Adding to 162651322521 its reverse (125223156261), we get a palindrome (287874478782).

The spelling of 162651322521 in words is "one hundred sixty-two billion, six hundred fifty-one million, three hundred twenty-two thousand, five hundred twenty-one".