6550155613 has 4 divisors (see below), whose sum is σ = 6709915548. Its totient is φ = 6390395680.

The previous prime is 6550155553. The next prime is 6550155617. The reversal of 6550155613 is 3165510556.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2060887609 + 4489268004 = 45397^2 + 67002^2 .

It is a cyclic number.

It is not a de Polignac number, because 6550155613 - 2²⁹ = 6013284701 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 (6550155617) 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, 79879906 + ... + 79879987.

It is an arithmetic number, because the mean of its divisors is an integer number (1677478887).

Almost surely, 2^6550155613 is an apocalyptic number.

It is an amenable number.

6550155613 is a deficient number, since it is larger than the sum of its proper divisors (159759935).

6550155613 is a wasteful number, since it uses less digits than its factorization.

6550155613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159759934.

The product of its (nonzero) digits is 67500, while the sum is 37.

The square root of 6550155613 is about 80933.0316558079. The cubic root of 6550155613 is about 1871.0434483669.

The spelling of 6550155613 in words is "six billion, five hundred fifty million, one hundred fifty-five thousand, six hundred thirteen".