161519479137 has 8 divisors (see below), whose sum is σ = 239288117280. Its totient is φ = 107679652740.

The previous prime is 161519479117. The next prime is 161519479141. The reversal of 161519479137 is 731974915161.

161519479137 is a `hidden beast` number, since 1 + 6 + 1 + 519 + 4 + 7 + 91 + 37 = 666.

It is not a de Polignac number, because 161519479137 - 2⁸ = 161519478881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161519479117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2991101439 + ... + 2991101492.

It is an arithmetic number, because the mean of its divisors is an integer number (29911014660).

Almost surely, 2^161519479137 is an apocalyptic number.

It is an amenable number.

161519479137 is a deficient number, since it is larger than the sum of its proper divisors (77768638143).

161519479137 is an equidigital number, since it uses as much as digits as its factorization.

161519479137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5982202940 (or 5982202934 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 54.

The spelling of 161519479137 in words is "one hundred sixty-one billion, five hundred nineteen million, four hundred seventy-nine thousand, one hundred thirty-seven".