157664502542 has 4 divisors (see below), whose sum is σ = 236496753816. Its totient is φ = 78832251270.

The previous prime is 157664502539. The next prime is 157664502613. The reversal of 157664502542 is 245205466751.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39416125634 + ... + 39416125637.

It is an arithmetic number, because the mean of its divisors is an integer number (59124188454).

Almost surely, 2^157664502542 is an apocalyptic number.

157664502542 is a deficient number, since it is larger than the sum of its proper divisors (78832251274).

157664502542 is an equidigital number, since it uses as much as digits as its factorization.

157664502542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78832251273.

The product of its (nonzero) digits is 2016000, while the sum is 47.

The spelling of 157664502542 in words is "one hundred fifty-seven billion, six hundred sixty-four million, five hundred two thousand, five hundred forty-two".