157920120965 has 8 divisors (see below), whose sum is σ = 189512331000. Its totient is φ = 126330639552.

The previous prime is 157920120959. The next prime is 157920120971. The reversal of 157920120965 is 569021029751.

It is an interprime number because it is at equal distance from previous prime (157920120959) and next prime (157920120971).

It can be written as a sum of positive squares in 4 ways, for example, as 11554960036 + 146365160929 = 107494^2 + 382577^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 157920120965 - 2²² = 157915926661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552590 + ... + 788159.

It is an arithmetic number, because the mean of its divisors is an integer number (23689041375).

Almost surely, 2^157920120965 is an apocalyptic number.

It is an amenable number.

157920120965 is a deficient number, since it is larger than the sum of its proper divisors (31592210035).

157920120965 is a wasteful number, since it uses less digits than its factorization.

157920120965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364311.

The product of its (nonzero) digits is 340200, while the sum is 47.

The spelling of 157920120965 in words is "one hundred fifty-seven billion, nine hundred twenty million, one hundred twenty thousand, nine hundred sixty-five".