161262052478 has 32 divisors (see below), whose sum is σ = 252912844800. Its totient is φ = 76971936096.

The previous prime is 161262052447. The next prime is 161262052537. The reversal of 161262052478 is 874250262161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95251400 + ... + 95253092.

It is an arithmetic number, because the mean of its divisors is an integer number (7903526400).

Almost surely, 2^161262052478 is an apocalyptic number.

161262052478 is a deficient number, since it is larger than the sum of its proper divisors (91650792322).

161262052478 is a wasteful number, since it uses less digits than its factorization.

161262052478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4616.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 161262052478 in words is "one hundred sixty-one billion, two hundred sixty-two million, fifty-two thousand, four hundred seventy-eight".