49381865577 has 24 divisors (see below), whose sum is σ = 79469470080. Its totient is φ = 29291626080.

The previous prime is 49381865551. The next prime is 49381865587. The reversal of 49381865577 is 77556818394.

49381865577 is a `hidden beast` number, since 49 + 3 + 8 + 18 + 6 + 5 + 577 = 666.

It is not a de Polignac number, because 49381865577 - 2⁸ = 49381865321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49381865527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5301802 + ... + 5311107.

It is an arithmetic number, because the mean of its divisors is an integer number (3311227920).

Almost surely, 2^49381865577 is an apocalyptic number.

49381865577 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

49381865577 is a deficient number, since it is larger than the sum of its proper divisors (30087604503).

49381865577 is a wasteful number, since it uses less digits than its factorization.

49381865577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10612973 (or 10612970 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 63.

The spelling of 49381865577 in words is "forty-nine billion, three hundred eighty-one million, eight hundred sixty-five thousand, five hundred seventy-seven".