2172761331257 has 16 divisors (see below), whose sum is σ = 2407318761024. Its totient is φ = 1960819616800.

The previous prime is 2172761331229. The next prime is 2172761331277. The reversal of 2172761331257 is 7521331672712.

It is not a de Polignac number, because 2172761331257 - 2⁶ = 2172761331193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172761331277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5775419 + ... + 6140112.

It is an arithmetic number, because the mean of its divisors is an integer number (150457422564).

Almost surely, 2^{2172761331257} is an apocalyptic number.

It is an amenable number.

2172761331257 is a deficient number, since it is larger than the sum of its proper divisors (234557429767).

2172761331257 is a wasteful number, since it uses less digits than its factorization.

2172761331257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11915701 (or 11915679 counting only the distinct ones).

The product of its digits is 740880, while the sum is 47.

The spelling of 2172761331257 in words is "two trillion, one hundred seventy-two billion, seven hundred sixty-one million, three hundred thirty-one thousand, two hundred fifty-seven".