49165191731 has 16 divisors (see below), whose sum is σ = 51846168960. Its totient is φ = 46550824320.

The previous prime is 49165191707. The next prime is 49165191793. The reversal of 49165191731 is 13719156194.

It is a happy number.

It is not a de Polignac number, because 49165191731 - 2²² = 49160997427 is a prime.

It is a super-2 number, since 2×49165191731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49165191701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3578966 + ... + 3592676.

It is an arithmetic number, because the mean of its divisors is an integer number (3240385560).

Almost surely, 2^49165191731 is an apocalyptic number.

49165191731 is a deficient number, since it is larger than the sum of its proper divisors (2680977229).

49165191731 is a wasteful number, since it uses less digits than its factorization.

49165191731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16126.

The product of its digits is 204120, while the sum is 47.

The spelling of 49165191731 in words is "forty-nine billion, one hundred sixty-five million, one hundred ninety-one thousand, seven hundred thirty-one".