49137446640 has 80 divisors (see below), whose sum is σ = 152534442528. Its totient is φ = 13085395968.

The previous prime is 49137446599. The next prime is 49137446653. The reversal of 49137446640 is 4664473194.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 49137446640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36262 + ... + 315578.

Almost surely, 2^49137446640 is an apocalyptic number.

49137446640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49137446640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76267221264).

49137446640 is an abundant number, since it is smaller than the sum of its proper divisors (103396995888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49137446640 is a wasteful number, since it uses less digits than its factorization.

49137446640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280066 (or 280060 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 48.

The spelling of 49137446640 in words is "forty-nine billion, one hundred thirty-seven million, four hundred forty-six thousand, six hundred forty".