611651613 has 4 divisors (see below), whose sum is σ = 815535488. Its totient is φ = 407767740.

The previous prime is 611651587. The next prime is 611651617. The reversal of 611651613 is 316156116.

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.

It is not a de Polignac number, because 611651613 - 2⁸ = 611651357 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 (611651617) 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, 101941933 + ... + 101941938.

It is an arithmetic number, because the mean of its divisors is an integer number (203883872).

Almost surely, 2^611651613 is an apocalyptic number.

It is an amenable number.

611651613 is a deficient number, since it is larger than the sum of its proper divisors (203883875).

611651613 is a wasteful number, since it uses less digits than its factorization.

611651613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203883874.

The product of its digits is 3240, while the sum is 30.

The square root of 611651613 is about 24731.5913964306. The cubic root of 611651613 is about 848.8573402677.

The spelling of 611651613 in words is "six hundred eleven million, six hundred fifty-one thousand, six hundred thirteen".