161840828053731 has 64 divisors (see below), whose sum is σ = 237363193774080. Its totient is φ = 97643570411520.

The previous prime is 161840828053727. The next prime is 161840828053747. The reversal of 161840828053731 is 137350828048161.

It is not a de Polignac number, because 161840828053731 - 2² = 161840828053727 is a prime.

It is a super-2 number, since 2×161840828053731² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161840828051731) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 158122686 + ... + 159142908.

It is an arithmetic number, because the mean of its divisors is an integer number (3708799902720).

Almost surely, 2^{161840828053731} is an apocalyptic number.

161840828053731 is a deficient number, since it is larger than the sum of its proper divisors (75522365720349).

161840828053731 is a wasteful number, since it uses less digits than its factorization.

161840828053731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020916.

The product of its (nonzero) digits is 7741440, while the sum is 57.

The spelling of 161840828053731 in words is "one hundred sixty-one trillion, eight hundred forty billion, eight hundred twenty-eight million, fifty-three thousand, seven hundred thirty-one".