157321422721 has 4 divisors (see below), whose sum is σ = 158522349744. Its totient is φ = 156120495700.

The previous prime is 157321422673. The next prime is 157321422751. The reversal of 157321422721 is 127224123751.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 157321422721 - 2¹¹ = 157321420673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157321422751) 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, 600463315 + ... + 600463576.

It is an arithmetic number, because the mean of its divisors is an integer number (39630587436).

Almost surely, 2^157321422721 is an apocalyptic number.

It is an amenable number.

157321422721 is a deficient number, since it is larger than the sum of its proper divisors (1200927023).

157321422721 is a wasteful number, since it uses less digits than its factorization.

157321422721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200927022.

The product of its digits is 47040, while the sum is 37.

The spelling of 157321422721 in words is "one hundred fifty-seven billion, three hundred twenty-one million, four hundred twenty-two thousand, seven hundred twenty-one".