655973144 has 32 divisors (see below), whose sum is σ = 1274279040. Its totient is φ = 316243200.

The previous prime is 655973137. The next prime is 655973147. The reversal of 655973144 is 441379556.

It is a junction number, because it is equal to n+sod(n) for n = 655973095 and 655973104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655973147) 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, 64982 + ... + 74394.

It is an arithmetic number, because the mean of its divisors is an integer number (39821220).

Almost surely, 2^655973144 is an apocalyptic number.

It is an amenable number.

655973144 is a deficient number, since it is larger than the sum of its proper divisors (618305896).

655973144 is a wasteful number, since it uses less digits than its factorization.

655973144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9731 (or 9727 counting only the distinct ones).

The product of its digits is 453600, while the sum is 44.

The square root of 655973144 is about 25611.9726690468. The cubic root of 655973144 is about 868.8844397363.

The spelling of 655973144 in words is "six hundred fifty-five million, nine hundred seventy-three thousand, one hundred forty-four".