49421081565 has 48 divisors (see below), whose sum is σ = 92189228976. Its totient is φ = 24400742400.

The previous prime is 49421081537. The next prime is 49421081579. The reversal of 49421081565 is 56518012494.

49421081565 is a `hidden beast` number, since 4 + 9 + 4 + 2 + 1 + 0 + 81 + 565 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 586269369 + 48834812196 = 24213^2 + 220986^2 .

It is not a de Polignac number, because 49421081565 - 2⁵ = 49421081533 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 49421081565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 482866 + ... + 576195.

It is an arithmetic number, because the mean of its divisors is an integer number (1920608937).

Almost surely, 2^49421081565 is an apocalyptic number.

49421081565 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

49421081565 is a deficient number, since it is larger than the sum of its proper divisors (42768147411).

49421081565 is a wasteful number, since it uses less digits than its factorization.

49421081565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059150 (or 1059147 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 49421081565 in words is "forty-nine billion, four hundred twenty-one million, eighty-one thousand, five hundred sixty-five".