655493177906 has 12 divisors (see below), whose sum is σ = 1143768708558. Its totient is φ = 280925647632.

The previous prime is 655493177903. The next prime is 655493177953. The reversal of 655493177906 is 609771394556.

It can be written as a sum of positive squares in only one way, i.e., 586053022681 + 69440155225 = 765541^2 + 263515^2 .

It is not an unprimeable number, because it can be changed into a prime (655493177903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3344352851 + ... + 3344353046.

Almost surely, 2^655493177906 is an apocalyptic number.

655493177906 is a deficient number, since it is larger than the sum of its proper divisors (488275530652).

655493177906 is a wasteful number, since it uses less digits than its factorization.

655493177906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6688705913 (or 6688705906 counting only the distinct ones).

The product of its (nonzero) digits is 42865200, while the sum is 62.

The spelling of 655493177906 in words is "six hundred fifty-five billion, four hundred ninety-three million, one hundred seventy-seven thousand, nine hundred six".