18152561172052 has 6 divisors (see below), whose sum is σ = 31766982051098. Its totient is φ = 9076280586024.

The previous prime is 18152561172041. The next prime is 18152561172101. The reversal of 18152561172052 is 25027116525181.

It can be written as a sum of positive squares in only one way, i.e., 16191256154896 + 1961305017156 = 4023836^2 + 1400466^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18152561171993 and 18152561172011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2269070146503 + ... + 2269070146510.

Almost surely, 2^{18152561172052} is an apocalyptic number.

It is an amenable number.

18152561172052 is a deficient number, since it is larger than the sum of its proper divisors (13614420879046).

18152561172052 is a wasteful number, since it uses less digits than its factorization.

18152561172052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538140293017 (or 4538140293015 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 46.

The spelling of 18152561172052 in words is "eighteen trillion, one hundred fifty-two billion, five hundred sixty-one million, one hundred seventy-two thousand, fifty-two".