157640663983 has 4 divisors (see below), whose sum is σ = 171971633448. Its totient is φ = 143309694520.

The previous prime is 157640663959. The next prime is 157640663989. The reversal of 157640663983 is 389366046751.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157640663983 - 2⁵ = 157640663951 is a prime.

It is a super-2 number, since 2×157640663983² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157640663989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7165484716 + ... + 7165484737.

It is an arithmetic number, because the mean of its divisors is an integer number (42992908362).

Almost surely, 2^157640663983 is an apocalyptic number.

157640663983 is a deficient number, since it is larger than the sum of its proper divisors (14330969465).

157640663983 is a wasteful number, since it uses less digits than its factorization.

157640663983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14330969464.

The product of its (nonzero) digits is 19595520, while the sum is 58.

The spelling of 157640663983 in words is "one hundred fifty-seven billion, six hundred forty million, six hundred sixty-three thousand, nine hundred eighty-three".