157557406470647 has 4 divisors (see below), whose sum is σ = 157579853750280. Its totient is φ = 157534959191016.

The previous prime is 157557406470637. The next prime is 157557406470661. The reversal of 157557406470647 is 746074604755751.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 157557406470647 - 2²² = 157557402276343 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 (157557406470637) 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, 11223629288 + ... + 11223643325.

It is an arithmetic number, because the mean of its divisors is an integer number (39394963437570).

Almost surely, 2^{157557406470647} is an apocalyptic number.

157557406470647 is a deficient number, since it is larger than the sum of its proper divisors (22447279633).

157557406470647 is an equidigital number, since it uses as much as digits as its factorization.

157557406470647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22447279632.

The product of its (nonzero) digits is 691488000, while the sum is 68.

The spelling of 157557406470647 in words is "one hundred fifty-seven trillion, five hundred fifty-seven billion, four hundred six million, four hundred seventy thousand, six hundred forty-seven".