1157658371640 has 576 divisors, whose sum is σ = 4155419473920. Its totient is φ = 278687692800.

The previous prime is 1157658371629. The next prime is 1157658371669. The reversal of 1157658371640 is 461738567511.

1157658371640 is a `hidden beast` number, since 1 + 1 + 5 + 7 + 6 + 583 + 7 + 16 + 40 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 431477739 + ... + 431480421.

It is an arithmetic number, because the mean of its divisors is an integer number (7214269920).

Almost surely, 2^{1157658371640} is an apocalyptic number.

1157658371640 is a gapful number since it is divisible by the number (10) 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 1157658371640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2077709736960).

1157658371640 is an abundant number, since it is smaller than the sum of its proper divisors (2997761102280).

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

1157658371640 is a wasteful number, since it uses less digits than its factorization.

1157658371640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836 (or 2788 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 54.

The spelling of 1157658371640 in words is "one trillion, one hundred fifty-seven billion, six hundred fifty-eight million, three hundred seventy-one thousand, six hundred forty".