157909489619 has 32 divisors (see below), whose sum is σ = 191967713280. Its totient is φ = 126801303552.

The previous prime is 157909489607. The next prime is 157909489631. The reversal of 157909489619 is 916984909751.

It is an interprime number because it is at equal distance from previous prime (157909489607) and next prime (157909489631).

It is not a de Polignac number, because 157909489619 - 2⁴ = 157909489603 is a prime.

It is a super-2 number, since 2×157909489619² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157909489679) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23853692 + ... + 23860310.

It is an arithmetic number, because the mean of its divisors is an integer number (5998991040).

Almost surely, 2^157909489619 is an apocalyptic number.

157909489619 is a deficient number, since it is larger than the sum of its proper divisors (34058223661).

157909489619 is a wasteful number, since it uses less digits than its factorization.

157909489619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7539.

The product of its (nonzero) digits is 44089920, while the sum is 68.

The spelling of 157909489619 in words is "one hundred fifty-seven billion, nine hundred nine million, four hundred eighty-nine thousand, six hundred nineteen".