49999999999980 has 48 divisors (see below), whose sum is σ = 140450160824064. Its totient is φ = 13290460873920.

The previous prime is 49999999999949. The next prime is 49999999999981. The reversal of 49999999999980 is 8999999999994.

It is a super-9 number, since 9×49999999999980⁹ (a number of 125 digits) contains 999999999 as substring.

It is not an unprimeable number, because it can be changed into a prime (49999999999981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1339745542 + ... + 1339782861.

It is an arithmetic number, because the mean of its divisors is an integer number (2926045017168).

Almost surely, 2^{49999999999980} is an apocalyptic number.

It is an amenable number.

49999999999980 is an abundant number, since it is smaller than the sum of its proper divisors (90450160824084).

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

49999999999980 is a wasteful number, since it uses less digits than its factorization.

49999999999980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679528726 (or 2679528724 counting only the distinct ones).

The product of its (nonzero) digits is 1004193907488, while the sum is 111.

The spelling of 49999999999980 in words is "forty-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty".