157776228172 has 12 divisors (see below), whose sum is σ = 276382051960. Its totient is φ = 78809927616.

The previous prime is 157776228163. The next prime is 157776228229. The reversal of 157776228172 is 271822677751.

It is a super-3 number, since 3×157776228172³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19542078 + ... + 19550149.

Almost surely, 2^157776228172 is an apocalyptic number.

It is an amenable number.

157776228172 is a deficient number, since it is larger than the sum of its proper divisors (118605823788).

157776228172 is a wasteful number, since it uses less digits than its factorization.

157776228172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39093240 (or 39093238 counting only the distinct ones).

The product of its digits is 4609920, while the sum is 55.

The spelling of 157776228172 in words is "one hundred fifty-seven billion, seven hundred seventy-six million, two hundred twenty-eight thousand, one hundred seventy-two".