157797631407 has 8 divisors (see below), whose sum is σ = 226581214384. Its totient is φ = 97106234688.

The previous prime is 157797631393. The next prime is 157797631423. The reversal of 157797631407 is 704136797751.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157797631407 - 2⁴ = 157797631391 is a prime.

It is the 397238-th Hogben 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 (157797631447) by changing a digit.

It is a nontrivial repunit in base 397237.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2023046518 + ... + 2023046595.

It is an arithmetic number, because the mean of its divisors is an integer number (28322651798).

Almost surely, 2^157797631407 is an apocalyptic number.

157797631407 is a deficient number, since it is larger than the sum of its proper divisors (68783582977).

157797631407 is a wasteful number, since it uses less digits than its factorization.

157797631407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046093129.

The product of its (nonzero) digits is 7779240, while the sum is 57.

The spelling of 157797631407 in words is "one hundred fifty-seven billion, seven hundred ninety-seven million, six hundred thirty-one thousand, four hundred seven".