615655655 has 4 divisors (see below), whose sum is σ = 738786792. Its totient is φ = 492524520.

The previous prime is 615655627. The next prime is 615655657. The reversal of 615655655 is 556556516.

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

It is not a de Polignac number, because 615655655 - 2⁸ = 615655399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615655657) 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, 61565561 + ... + 61565570.

It is an arithmetic number, because the mean of its divisors is an integer number (184696698).

Almost surely, 2^615655655 is an apocalyptic number.

615655655 is a deficient number, since it is larger than the sum of its proper divisors (123131137).

615655655 is a wasteful number, since it uses less digits than its factorization.

615655655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123131136.

The product of its digits is 675000, while the sum is 44.

The square root of 615655655 is about 24812.4092945445. The cubic root of 615655655 is about 850.7055986536.

The spelling of 615655655 in words is "six hundred fifteen million, six hundred fifty-five thousand, six hundred fifty-five".