157504408973 has 4 divisors (see below), whose sum is σ = 157509645468. Its totient is φ = 157499172480.

The previous prime is 157504408969. The next prime is 157504409021. The reversal of 157504408973 is 379804405751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 379804405751 = 419 ⋅906454429.

It can be written as a sum of positive squares in 2 ways, for example, as 119828822569 + 37675586404 = 346163^2 + 194102^2 .

It is a cyclic number.

It is not a de Polignac number, because 157504408973 - 2² = 157504408969 is a prime.

It is a super-3 number, since 3×157504408973³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157504498973) 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, 2572868 + ... + 2633373.

It is an arithmetic number, because the mean of its divisors is an integer number (39377411367).

Almost surely, 2^157504408973 is an apocalyptic number.

It is an amenable number.

157504408973 is a deficient number, since it is larger than the sum of its proper divisors (5236495).

157504408973 is an equidigital number, since it uses as much as digits as its factorization.

157504408973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5236494.

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 157504408973 in words is "one hundred fifty-seven billion, five hundred four million, four hundred eight thousand, nine hundred seventy-three".