49669013991 has 16 divisors (see below), whose sum is σ = 67352940128. Its totient is φ = 32549558400.

The previous prime is 49669013959. The next prime is 49669014023. The reversal of 49669013991 is 19931096694.

It is an interprime number because it is at equal distance from previous prime (49669013959) and next prime (49669014023).

It is not a de Polignac number, because 49669013991 - 2⁵ = 49669013959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49669013941) 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, 212925 + ... + 380361.

It is an arithmetic number, because the mean of its divisors is an integer number (4209558758).

Almost surely, 2^49669013991 is an apocalyptic number.

49669013991 is a deficient number, since it is larger than the sum of its proper divisors (17683926137).

49669013991 is a wasteful number, since it uses less digits than its factorization.

49669013991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169122.

The product of its (nonzero) digits is 2834352, while the sum is 57.

The spelling of 49669013991 in words is "forty-nine billion, six hundred sixty-nine million, thirteen thousand, nine hundred ninety-one".