157977452797 has 8 divisors (see below), whose sum is σ = 167273862912. Its totient is φ = 148681444800.

The previous prime is 157977452783. The next prime is 157977452813. The reversal of 157977452797 is 797254779751.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157977452797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157977453797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1160022 + ... + 1289032.

It is an arithmetic number, because the mean of its divisors is an integer number (20909232864).

Almost surely, 2^157977452797 is an apocalyptic number.

157977452797 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

157977452797 is a deficient number, since it is larger than the sum of its proper divisors (9296410115).

157977452797 is a wasteful number, since it uses less digits than its factorization.

157977452797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201059.

The product of its digits is 272273400, while the sum is 70.

The spelling of 157977452797 in words is "one hundred fifty-seven billion, nine hundred seventy-seven million, four hundred fifty-two thousand, seven hundred ninety-seven".