157942942858 has 4 divisors (see below), whose sum is σ = 236914414290. Its totient is φ = 78971471428.

The previous prime is 157942942853. The next prime is 157942942897. The reversal of 157942942858 is 858249249751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 858249249751 = 95621 ⋅8975531.

It can be written as a sum of positive squares in only one way, i.e., 148739034889 + 9203907969 = 385667^2 + 95937^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 157942942858.

It is not an unprimeable number, because it can be changed into a prime (157942942853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39485735713 + ... + 39485735716.

Almost surely, 2^157942942858 is an apocalyptic number.

157942942858 is a deficient number, since it is larger than the sum of its proper divisors (78971471432).

157942942858 is an equidigital number, since it uses as much as digits as its factorization.

157942942858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78971471431.

The product of its digits is 58060800, while the sum is 64.

The spelling of 157942942858 in words is "one hundred fifty-seven billion, nine hundred forty-two million, nine hundred forty-two thousand, eight hundred fifty-eight".