655172770 has 32 divisors (see below), whose sum is σ = 1360395648. Its totient is φ = 222528768.

The previous prime is 655172767. The next prime is 655172773. The reversal of 655172770 is 77271556.

It is an interprime number because it is at equal distance from previous prime (655172767) and next prime (655172773).

It is not an unprimeable number, because it can be changed into a prime (655172773) 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, 36247 + ... + 51226.

It is an arithmetic number, because the mean of its divisors is an integer number (42512364).

Almost surely, 2^655172770 is an apocalyptic number.

655172770 is an abundant number, since it is smaller than the sum of its proper divisors (705222878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

655172770 is a wasteful number, since it uses less digits than its factorization.

655172770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87594.

The product of its (nonzero) digits is 102900, while the sum is 40.

The square root of 655172770 is about 25596.3429028445. The cubic root of 655172770 is about 868.5309112661.

The spelling of 655172770 in words is "six hundred fifty-five million, one hundred seventy-two thousand, seven hundred seventy".