161506312612634 has 48 divisors (see below), whose sum is σ = 267255592970184. Its totient is φ = 73144659899520.

The previous prime is 161506312612627. The next prime is 161506312612639. The reversal of 161506312612634 is 436216213605161.

161506312612634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 142495430751025 + 19010881861609 = 11937145^2 + 4360147^2 .

It is not an unprimeable number, because it can be changed into a prime (161506312612639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156981104 + ... + 158006580.

Almost surely, 2^{161506312612634} is an apocalyptic number.

161506312612634 is a deficient number, since it is larger than the sum of its proper divisors (105749280357550).

161506312612634 is a wasteful number, since it uses less digits than its factorization.

161506312612634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027871 (or 1027860 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 161506312612634 in words is "one hundred sixty-one trillion, five hundred six billion, three hundred twelve million, six hundred twelve thousand, six hundred thirty-four".