137664494919 has 16 divisors (see below), whose sum is σ = 233082743040. Its totient is φ = 78665425560.

The previous prime is 137664494911. The next prime is 137664494951. The reversal of 137664494919 is 919494466731.

137664494919 is a `hidden beast` number, since 1 + 3 + 76 + 64 + 494 + 9 + 19 = 666.

It is not a de Polignac number, because 137664494919 - 2³ = 137664494911 is a prime.

It is a super-2 number, since 2×137664494919² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137664494911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364191597 + ... + 364191974.

It is an arithmetic number, because the mean of its divisors is an integer number (14567671440).

Almost surely, 2^137664494919 is an apocalyptic number.

137664494919 is a deficient number, since it is larger than the sum of its proper divisors (95418248121).

137664494919 is an equidigital number, since it uses as much as digits as its factorization.

137664494919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728383587 (or 728383581 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 63.

The spelling of 137664494919 in words is "one hundred thirty-seven billion, six hundred sixty-four million, four hundred ninety-four thousand, nine hundred nineteen".