1157718985971 has 64 divisors (see below), whose sum is σ = 1684820213760. Its totient is φ = 704431728000.

The previous prime is 1157718985967. The next prime is 1157718985979. The reversal of 1157718985971 is 1795898177511.

It is not a de Polignac number, because 1157718985971 - 2² = 1157718985967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1157718985896 and 1157718985905.

It is not an unprimeable number, because it can be changed into a prime (1157718985979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 639269656 + ... + 639271466.

It is an arithmetic number, because the mean of its divisors is an integer number (26325315840).

Almost surely, 2^{1157718985971} is an apocalyptic number.

1157718985971 is a deficient number, since it is larger than the sum of its proper divisors (527101227789).

1157718985971 is a wasteful number, since it uses less digits than its factorization.

1157718985971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288.

The product of its digits is 44452800, while the sum is 69.

The spelling of 1157718985971 in words is "one trillion, one hundred fifty-seven billion, seven hundred eighteen million, nine hundred eighty-five thousand, nine hundred seventy-one".