1157993501 has 8 divisors (see below), whose sum is σ = 1324015680. Its totient is φ = 992119968.

The previous prime is 1157993491. The next prime is 1157993503. The reversal of 1157993501 is 1053997511.

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

It is not a de Polignac number, because 1157993501 - 2¹⁸ = 1157731357 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 (1157993503) 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, 19931 + ... + 52088.

It is an arithmetic number, because the mean of its divisors is an integer number (165501960).

Almost surely, 2^1157993501 is an apocalyptic number.

It is an amenable number.

1157993501 is a deficient number, since it is larger than the sum of its proper divisors (166022179).

1157993501 is an equidigital number, since it uses as much as digits as its factorization.

1157993501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74323.

The product of its (nonzero) digits is 42525, while the sum is 41.

The square root of 1157993501 is about 34029.3035632527. The cubic root of 1157993501 is about 1050.1114019368. Note that the first 3 decimals are identical.

The spelling of 1157993501 in words is "one billion, one hundred fifty-seven million, nine hundred ninety-three thousand, five hundred one".