161034272540 has 12 divisors (see below), whose sum is σ = 338171972376. Its totient is φ = 64413709008.

The previous prime is 161034272537. The next prime is 161034272549. The reversal of 161034272540 is 45272430161.

It is a self number, because there is not a number n which added to its sum of digits gives 161034272540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161034272549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4025856794 + ... + 4025856833.

It is an arithmetic number, because the mean of its divisors is an integer number (28180997698).

Almost surely, 2^161034272540 is an apocalyptic number.

161034272540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161034272540 is an abundant number, since it is smaller than the sum of its proper divisors (177137699836).

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

161034272540 is a wasteful number, since it uses less digits than its factorization.

161034272540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8051713636 (or 8051713634 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 161034272540 in words is "one hundred sixty-one billion, thirty-four million, two hundred seventy-two thousand, five hundred forty".