1157507409997 has 8 divisors (see below), whose sum is σ = 1160113777056. Its totient is φ = 1154901589872.

The previous prime is 1157507409973. The next prime is 1157507410061. The reversal of 1157507409997 is 7999047057511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157507409997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157507401997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4259403 + ... + 4522999.

It is an arithmetic number, because the mean of its divisors is an integer number (145014222132).

Almost surely, 2^{1157507409997} is an apocalyptic number.

It is an amenable number.

1157507409997 is a deficient number, since it is larger than the sum of its proper divisors (2606367059).

1157507409997 is an equidigital number, since it uses as much as digits as its factorization.

1157507409997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273467.

The product of its (nonzero) digits is 25004700, while the sum is 64.

It can be divided in two parts, 1157507 and 409997, that added together give a square (1567504 = 1252²).

The spelling of 1157507409997 in words is "one trillion, one hundred fifty-seven billion, five hundred seven million, four hundred nine thousand, nine hundred ninety-seven".