161099137254 has 32 divisors (see below), whose sum is σ = 351517501440. Its totient is φ = 48813965600.

The previous prime is 161099137249. The next prime is 161099137267. The reversal of 161099137254 is 452731990161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780859 + ... + 965369.

It is an arithmetic number, because the mean of its divisors is an integer number (10984921920).

Almost surely, 2^161099137254 is an apocalyptic number.

161099137254 is an abundant number, since it is smaller than the sum of its proper divisors (190418364186).

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

161099137254 is a wasteful number, since it uses less digits than its factorization.

161099137254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197756.

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 161099137254 in words is "one hundred sixty-one billion, ninety-nine million, one hundred thirty-seven thousand, two hundred fifty-four".