655734881 has 4 divisors (see below), whose sum is σ = 655789872. Its totient is φ = 655679892.

The previous prime is 655734857. The next prime is 655734887. The reversal of 655734881 is 188437556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 655734881 - 2¹⁰ = 655733857 is a prime.

It is a super-2 number, since 2×655734881² = 859976468320168322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655734887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271 + ... + 36236.

It is an arithmetic number, because the mean of its divisors is an integer number (163947468).

Almost surely, 2^655734881 is an apocalyptic number.

It is an amenable number.

655734881 is a deficient number, since it is larger than the sum of its proper divisors (54991).

655734881 is a wasteful number, since it uses less digits than its factorization.

655734881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54990.

The product of its digits is 806400, while the sum is 47.

The square root of 655734881 is about 25607.3208477576. The cubic root of 655734881 is about 868.7792280697.

The spelling of 655734881 in words is "six hundred fifty-five million, seven hundred thirty-four thousand, eight hundred eighty-one".