1157640557990 has 48 divisors (see below), whose sum is σ = 2475531191232. Its totient is φ = 388460532096.

The previous prime is 1157640557981. The next prime is 1157640558031. The reversal of 1157640557990 is 997550467511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25110287 + ... + 25156346.

It is an arithmetic number, because the mean of its divisors is an integer number (51573566484).

Almost surely, 2^{1157640557990} is an apocalyptic number.

1157640557990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1157640557990 is an abundant number, since it is smaller than the sum of its proper divisors (1317890633242).

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

1157640557990 is a wasteful number, since it uses less digits than its factorization.

1157640557990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50266701 (or 50266694 counting only the distinct ones).

The product of its (nonzero) digits is 11907000, while the sum is 59.

The spelling of 1157640557990 in words is "one trillion, one hundred fifty-seven billion, six hundred forty million, five hundred fifty-seven thousand, nine hundred ninety".