161125755570560 has 64 divisors (see below), whose sum is σ = 420208646648400. Its totient is φ = 58591183841280.

The previous prime is 161125755570553. The next prime is 161125755570623. The reversal of 161125755570560 is 65075557521161.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×161125755570560² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161125755570496 and 161125755570505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11443583555 + ... + 11443597634.

Almost surely, 2^{161125755570560} is an apocalyptic number.

161125755570560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161125755570560 is an abundant number, since it is smaller than the sum of its proper divisors (259082891077840).

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

161125755570560 is a wasteful number, since it uses less digits than its factorization.

161125755570560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22887181219 (or 22887181207 counting only the distinct ones).

The product of its (nonzero) digits is 11025000, while the sum is 56.

The spelling of 161125755570560 in words is "one hundred sixty-one trillion, one hundred twenty-five billion, seven hundred fifty-five million, five hundred seventy thousand, five hundred sixty".