161588881746870 has 64 divisors (see below), whose sum is σ = 389124096719616. Its totient is φ = 42944819322240.

The previous prime is 161588881746821. The next prime is 161588881746871. The reversal of 161588881746870 is 78647188885161.

It is a super-2 number, since 2×161588881746870² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161588881746871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24865237 + ... + 30683183.

It is an arithmetic number, because the mean of its divisors is an integer number (6080064011244).

Almost surely, 2^{161588881746870} is an apocalyptic number.

161588881746870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161588881746870 is an abundant number, since it is smaller than the sum of its proper divisors (227535214972746).

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

161588881746870 is a wasteful number, since it uses less digits than its factorization.

161588881746870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5821085.

The product of its (nonzero) digits is 1156055040, while the sum is 78.

The spelling of 161588881746870 in words is "one hundred sixty-one trillion, five hundred eighty-eight billion, eight hundred eighty-one million, seven hundred forty-six thousand, eight hundred seventy".