1157680672657 has 4 divisors (see below), whose sum is σ = 1157701107940. Its totient is φ = 1157660237376.

The previous prime is 1157680672639. The next prime is 1157680672669. The reversal of 1157680672657 is 7562760867511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 141971457681 + 1015709214976 = 376791^2 + 1007824^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157680672657 - 2⁷ = 1157680672529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1157680672595 and 1157680672604.

It is not an unprimeable number, because it can be changed into a prime (1157680672607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10132428 + ... + 10246045.

It is an arithmetic number, because the mean of its divisors is an integer number (289425276985).

Almost surely, 2^{1157680672657} is an apocalyptic number.

It is an amenable number.

1157680672657 is a deficient number, since it is larger than the sum of its proper divisors (20435283).

1157680672657 is an equidigital number, since it uses as much as digits as its factorization.

1157680672657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20435282.

The product of its (nonzero) digits is 29635200, while the sum is 61.

The spelling of 1157680672657 in words is "one trillion, one hundred fifty-seven billion, six hundred eighty million, six hundred seventy-two thousand, six hundred fifty-seven".