161015727496 has 48 divisors (see below), whose sum is σ = 328121400960. Its totient is φ = 74040557760.

The previous prime is 161015727463. The next prime is 161015727569. The reversal of 161015727496 is 694727510161.

It is a super-2 number, since 2×161015727496² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146661 + ... + 586123.

It is an arithmetic number, because the mean of its divisors is an integer number (6835862520).

Almost surely, 2^161015727496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161015727496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164060700480).

161015727496 is an abundant number, since it is smaller than the sum of its proper divisors (167105673464).

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

161015727496 is a wasteful number, since it uses less digits than its factorization.

161015727496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439766 (or 439749 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 161015727496 in words is "one hundred sixty-one billion, fifteen million, seven hundred twenty-seven thousand, four hundred ninety-six".