1957818099 has 8 divisors (see below), whose sum is σ = 2612549632. Its totient is φ = 1304149320.

The previous prime is 1957818061. The next prime is 1957818127. The reversal of 1957818099 is 9908187591.

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

It is not a de Polignac number, because 1957818099 - 2⁸ = 1957817843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1957818059) 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, 261379 + ... + 268764.

It is an arithmetic number, because the mean of its divisors is an integer number (326568704).

Almost surely, 2^1957818099 is an apocalyptic number.

1957818099 is a deficient number, since it is larger than the sum of its proper divisors (654731533).

1957818099 is a wasteful number, since it uses less digits than its factorization.

1957818099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531377.

The product of its (nonzero) digits is 1632960, while the sum is 57.

The square root of 1957818099 is about 44247.2383206003. The cubic root of 1957818099 is about 1251.0003936098. Note that the first 3 decimals are identical.

The spelling of 1957818099 in words is "one billion, nine hundred fifty-seven million, eight hundred eighteen thousand, ninety-nine".