49139633731 has 2 divisors, whose sum is σ = 49139633732. Its totient is φ = 49139633730.

The previous prime is 49139633729. The next prime is 49139633737. The reversal of 49139633731 is 13733693194.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49139633731 - 2¹ = 49139633729 is a prime.

It is a super-2 number, since 2×49139633731² (a number of 22 digits) contains 22 as substring.

Together with 49139633729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (49139633737) 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 as a sum of consecutive naturals, namely, 24569816865 + 24569816866.

It is an arithmetic number, because the mean of its divisors is an integer number (24569816866).

Almost surely, 2^49139633731 is an apocalyptic number.

49139633731 is a deficient number, since it is larger than the sum of its proper divisors (1).

49139633731 is an equidigital number, since it uses as much as digits as its factorization.

49139633731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 49.

The spelling of 49139633731 in words is "forty-nine billion, one hundred thirty-nine million, six hundred thirty-three thousand, seven hundred thirty-one".