7611513641 has 4 divisors (see below), whose sum is σ = 7612636032. Its totient is φ = 7610391252.

The previous prime is 7611513617. The next prime is 7611513643. The reversal of 7611513641 is 1463151167.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1463151167 = 3559 ⋅411113.

It is a cyclic number.

It is not a de Polignac number, because 7611513641 - 2³⁰ = 6537771817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7611513643) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 550961 + ... + 564606.

It is an arithmetic number, because the mean of its divisors is an integer number (1903159008).

Almost surely, 2^7611513641 is an apocalyptic number.

It is an amenable number.

7611513641 is a deficient number, since it is larger than the sum of its proper divisors (1122391).

7611513641 is a wasteful number, since it uses less digits than its factorization.

7611513641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122390.

The product of its digits is 15120, while the sum is 35.

The square root of 7611513641 is about 87243.9891396536. The cubic root of 7611513641 is about 1967.0874911234.

The spelling of 7611513641 in words is "seven billion, six hundred eleven million, five hundred thirteen thousand, six hundred forty-one".