172767055257 has 12 divisors (see below), whose sum is σ = 249556066864. Its totient is φ = 115176350520.

The previous prime is 172767055217. The next prime is 172767055283. The reversal of 172767055257 is 752550767271.

172767055257 is a `hidden beast` number, since 1 + 7 + 27 + 67 + 0 + 552 + 5 + 7 = 666.

It is not a de Polignac number, because 172767055257 - 2¹⁵ = 172767022489 is a prime.

It is a super-3 number, since 3×172767055257³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172767055217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 971382 + ... + 1135392.

Almost surely, 2^172767055257 is an apocalyptic number.

It is an amenable number.

172767055257 is a deficient number, since it is larger than the sum of its proper divisors (76789011607).

172767055257 is a wasteful number, since it uses less digits than its factorization.

172767055257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281060 (or 281057 counting only the distinct ones).

The product of its (nonzero) digits is 7203000, while the sum is 54.

The spelling of 172767055257 in words is "one hundred seventy-two billion, seven hundred sixty-seven million, fifty-five thousand, two hundred fifty-seven".