49661591590 has 64 divisors (see below), whose sum is σ = 97148491776. Its totient is φ = 18169362432.

The previous prime is 49661591531. The next prime is 49661591593. The reversal of 49661591590 is 9519516694.

It is a happy number.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49661591593) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7813854 + ... + 7820206.

It is an arithmetic number, because the mean of its divisors is an integer number (1517945184).

Almost surely, 2^49661591590 is an apocalyptic number.

49661591590 is a deficient number, since it is larger than the sum of its proper divisors (47486900186).

49661591590 is a wasteful number, since it uses less digits than its factorization.

49661591590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6913.

The product of its (nonzero) digits is 2624400, while the sum is 55.

The spelling of 49661591590 in words is "forty-nine billion, six hundred sixty-one million, five hundred ninety-one thousand, five hundred ninety".