161204155354552 has 8 divisors (see below), whose sum is σ = 302257791289800. Its totient is φ = 80602077677272.

The previous prime is 161204155354519. The next prime is 161204155354603. The reversal of 161204155354552 is 255453551402161.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 161204155354496 and 161204155354505.

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, 10075259709652 + ... + 10075259709667.

It is an arithmetic number, because the mean of its divisors is an integer number (37782223911225).

Almost surely, 2^{161204155354552} is an apocalyptic number.

It is an amenable number.

161204155354552 is a deficient number, since it is larger than the sum of its proper divisors (141053635935248).

161204155354552 is a wasteful number, since it uses less digits than its factorization.

161204155354552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20150519419325 (or 20150519419321 counting only the distinct ones).

The product of its (nonzero) digits is 3600000, while the sum is 49.

The spelling of 161204155354552 in words is "one hundred sixty-one trillion, two hundred four billion, one hundred fifty-five million, three hundred fifty-four thousand, five hundred fifty-two".