157917222544 has 15 divisors (see below), whose sum is σ = 305967698467. Its totient is φ = 78957816496.

The previous prime is 157917222539. The next prime is 157917222559. The reversal of 157917222544 is 445222719751.

The square root of 157917222544 is 397388.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×157917222544² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1539879 + ... + 1639225.

Almost surely, 2^157917222544 is an apocalyptic number.

157917222544 is the 397388-th square number.

It is an amenable number.

157917222544 is a deficient number, since it is larger than the sum of its proper divisors (148050475923).

157917222544 is an frugal number, since it uses more digits than its factorization.

157917222544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198702 (or 99349 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 49.

Multiplying 157917222544 by its sum of digits (49), we get a square (7737943904656 = 2781716²).

The spelling of 157917222544 in words is "one hundred fifty-seven billion, nine hundred seventeen million, two hundred twenty-two thousand, five hundred forty-four".