172077201261 has 12 divisors (see below), whose sum is σ = 284063951392. Its totient is φ = 98329829256.

The previous prime is 172077201227. The next prime is 172077201293. The reversal of 172077201261 is 162102770271.

It is not a de Polignac number, because 172077201261 - 2⁷ = 172077201133 is a prime.

It is a super-2 number, since 2×172077201261² (a number of 23 digits) contains 22 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 (172077206261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1365692011 + ... + 1365692136.

Almost surely, 2^172077201261 is an apocalyptic number.

It is an amenable number.

172077201261 is a deficient number, since it is larger than the sum of its proper divisors (111986750131).

172077201261 is a wasteful number, since it uses less digits than its factorization.

172077201261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731384160 (or 2731384157 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 36.

The spelling of 172077201261 in words is "one hundred seventy-two billion, seventy-seven million, two hundred one thousand, two hundred sixty-one".