655515607 has 16 divisors (see below), whose sum is σ = 686112768. Its totient is φ = 625716000.

The previous prime is 655515593. The next prime is 655515611. The reversal of 655515607 is 706515556.

It is a cyclic number.

It is not a de Polignac number, because 655515607 - 2¹⁹ = 654991319 is a prime.

It is a super-2 number, since 2×655515607² = 859401422041156898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 655515607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655515647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 872482 + ... + 873232.

It is an arithmetic number, because the mean of its divisors is an integer number (42882048).

Almost surely, 2^655515607 is an apocalyptic number.

655515607 is a deficient number, since it is larger than the sum of its proper divisors (30597161).

655515607 is a wasteful number, since it uses less digits than its factorization.

655515607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230.

The product of its (nonzero) digits is 157500, while the sum is 40.

The square root of 655515607 is about 25603.0390188352. The cubic root of 655515607 is about 868.6823790025.

The spelling of 655515607 in words is "six hundred fifty-five million, five hundred fifteen thousand, six hundred seven".