161500434754 has 16 divisors (see below), whose sum is σ = 248204561976. Its totient is φ = 78766300800.

The previous prime is 161500434659. The next prime is 161500434763. The reversal of 161500434754 is 457434005161.

It can be written as a sum of positive squares in 4 ways, for example, as 155878884225 + 5621550529 = 394815^2 + 74977^2 .

It is a super-2 number, since 2×161500434754² (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 7 ways as a sum of consecutive naturals, for example, 278464 + ... + 632884.

Almost surely, 2^161500434754 is an apocalyptic number.

161500434754 is a deficient number, since it is larger than the sum of its proper divisors (86704127222).

161500434754 is a wasteful number, since it uses less digits than its factorization.

161500434754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360021.

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 161500434754 in words is "one hundred sixty-one billion, five hundred million, four hundred thirty-four thousand, seven hundred fifty-four".