157122020767 has 4 divisors (see below), whose sum is σ = 157162824936. Its totient is φ = 157081216600.

The previous prime is 157122020749. The next prime is 157122020789. The reversal of 157122020767 is 767020221751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 767020221751 = 7 ⋅109574317393.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157122020767 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157122020717) 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, 20396308 + ... + 20404009.

It is an arithmetic number, because the mean of its divisors is an integer number (39290706234).

Almost surely, 2^157122020767 is an apocalyptic number.

157122020767 is a deficient number, since it is larger than the sum of its proper divisors (40804169).

157122020767 is an equidigital number, since it uses as much as digits as its factorization.

157122020767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40804168.

The product of its (nonzero) digits is 82320, while the sum is 40.

The spelling of 157122020767 in words is "one hundred fifty-seven billion, one hundred twenty-two million, twenty thousand, seven hundred sixty-seven".