161535154556 has 12 divisors (see below), whose sum is σ = 290326696968. Its totient is φ = 78584669712.

The previous prime is 161535154531. The next prime is 161535154567. The reversal of 161535154556 is 655451535161.

It is a self number, because there is not a number n which added to its sum of digits gives 161535154556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545726726 + ... + 545727021.

It is an arithmetic number, because the mean of its divisors is an integer number (24193891414).

Almost surely, 2^161535154556 is an apocalyptic number.

It is an amenable number.

161535154556 is a deficient number, since it is larger than the sum of its proper divisors (128791542412).

161535154556 is a wasteful number, since it uses less digits than its factorization.

161535154556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091453788 (or 1091453786 counting only the distinct ones).

The product of its digits is 1350000, while the sum is 47.

The spelling of 161535154556 in words is "one hundred sixty-one billion, five hundred thirty-five million, one hundred fifty-four thousand, five hundred fifty-six".