655197840722 has 4 divisors (see below), whose sum is σ = 982796761086. Its totient is φ = 327598920360.

The previous prime is 655197840691. The next prime is 655197840763. The reversal of 655197840722 is 227048791556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 542978870641 + 112218970081 = 736871^2 + 334991^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163799460179 + ... + 163799460182.

Almost surely, 2^655197840722 is an apocalyptic number.

655197840722 is a deficient number, since it is larger than the sum of its proper divisors (327598920364).

655197840722 is a wasteful number, since it uses less digits than its factorization.

655197840722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327598920363.

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 655197840722 in words is "six hundred fifty-five billion, one hundred ninety-seven million, eight hundred forty thousand, seven hundred twenty-two".