1157687521668 has 36 divisors (see below), whose sum is σ = 2929691001328. Its totient is φ = 385458801840.

The previous prime is 1157687521651. The next prime is 1157687521717. The reversal of 1157687521668 is 8661257867511.

It is a happy number.

1157687521668 is a `hidden beast` number, since 1 + 1 + 576 + 8 + 7 + 52 + 1 + 6 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18177718 + ... + 18241293.

Almost surely, 2^{1157687521668} is an apocalyptic number.

1157687521668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1157687521668 is an abundant number, since it is smaller than the sum of its proper divisors (1772003479660).

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

1157687521668 is a wasteful number, since it uses less digits than its factorization.

1157687521668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36419904 (or 36419899 counting only the distinct ones).

The product of its digits is 33868800, while the sum is 63.

The spelling of 1157687521668 in words is "one trillion, one hundred fifty-seven billion, six hundred eighty-seven million, five hundred twenty-one thousand, six hundred sixty-eight".