161655765054 has 48 divisors (see below), whose sum is σ = 389065971600. Its totient is φ = 44594691456.

The previous prime is 161655765023. The next prime is 161655765077. The reversal of 161655765054 is 450567556161.

It is a super-2 number, since 2×161655765054² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161655764988 and 161655765006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9471639 + ... + 9488690.

It is an arithmetic number, because the mean of its divisors is an integer number (8105541075).

Almost surely, 2^161655765054 is an apocalyptic number.

161655765054 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161655765054 is an abundant number, since it is smaller than the sum of its proper divisors (227410206546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161655765054 is a wasteful number, since it uses less digits than its factorization.

161655765054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18960377 (or 18960370 counting only the distinct ones).

The product of its (nonzero) digits is 3780000, while the sum is 51.

The spelling of 161655765054 in words is "one hundred sixty-one billion, six hundred fifty-five million, seven hundred sixty-five thousand, fifty-four".