49531477779 has 64 divisors (see below), whose sum is σ = 85324538880. Its totient is φ = 27811330560.

The previous prime is 49531477717. The next prime is 49531477789. The reversal of 49531477779 is 97777413594.

49531477779 is a `hidden beast` number, since 4 + 95 + 3 + 1 + 477 + 7 + 79 = 666.

49531477779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 49531477779 - 2⁹ = 49531477267 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (49531477789) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17096059 + ... + 17098955.

It is an arithmetic number, because the mean of its divisors is an integer number (1333195920).

Almost surely, 2^49531477779 is an apocalyptic number.

49531477779 is a deficient number, since it is larger than the sum of its proper divisors (35793061101).

49531477779 is a wasteful number, since it uses less digits than its factorization.

49531477779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4457 (or 4451 counting only the distinct ones).

The product of its digits is 46675440, while the sum is 63.

The spelling of 49531477779 in words is "forty-nine billion, five hundred thirty-one million, four hundred seventy-seven thousand, seven hundred seventy-nine".