172077027781 has 8 divisors (see below), whose sum is σ = 173147067200. Its totient is φ = 171007163712.

The previous prime is 172077027761. The next prime is 172077027799. The reversal of 172077027781 is 187720770271.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172077027781 - 2¹¹ = 172077025733 is a prime.

It is a super-2 number, since 2×172077027781² (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 (172077027701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2318656 + ... + 2391718.

It is an arithmetic number, because the mean of its divisors is an integer number (21643383400).

Almost surely, 2^172077027781 is an apocalyptic number.

It is an amenable number.

172077027781 is a deficient number, since it is larger than the sum of its proper divisors (1070039419).

172077027781 is a wasteful number, since it uses less digits than its factorization.

172077027781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87675.

The product of its (nonzero) digits is 537824, while the sum is 49.

The spelling of 172077027781 in words is "one hundred seventy-two billion, seventy-seven million, twenty-seven thousand, seven hundred eighty-one".