172230077765 has 64 divisors (see below), whose sum is σ = 233071914240. Its totient is φ = 121408634880.

The previous prime is 172230077737. The next prime is 172230077837. The reversal of 172230077765 is 567770032271.

It is not a de Polignac number, because 172230077765 - 2²⁴ = 172213300549 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 90030449 + ... + 90032361.

It is an arithmetic number, because the mean of its divisors is an integer number (3641748660).

Almost surely, 2^172230077765 is an apocalyptic number.

It is an amenable number.

172230077765 is a deficient number, since it is larger than the sum of its proper divisors (60841836475).

172230077765 is a wasteful number, since it uses less digits than its factorization.

172230077765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582.

The product of its (nonzero) digits is 864360, while the sum is 47.

The spelling of 172230077765 in words is "one hundred seventy-two billion, two hundred thirty million, seventy-seven thousand, seven hundred sixty-five".