655097690 has 32 divisors (see below), whose sum is σ = 1299424896. Its totient is φ = 236255040.

The previous prime is 655097689. The next prime is 655097719. The reversal of 655097690 is 96790556.

It is a super-2 number, since 2×655097690² = 858305966886672200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53006 + ... + 64185.

It is an arithmetic number, because the mean of its divisors is an integer number (40607028).

Almost surely, 2^655097690 is an apocalyptic number.

655097690 is a deficient number, since it is larger than the sum of its proper divisors (644327206).

655097690 is a wasteful number, since it uses less digits than its factorization.

655097690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117254.

The product of its (nonzero) digits is 510300, while the sum is 47.

The square root of 655097690 is about 25594.8762450612. The cubic root of 655097690 is about 868.4977333549.

The spelling of 655097690 in words is "six hundred fifty-five million, ninety-seven thousand, six hundred ninety".