7620507961 has 4 divisors (see below), whose sum is σ = 8313281424. Its totient is φ = 6927734500.

The previous prime is 7620507931. The next prime is 7620507971. The reversal of 7620507961 is 1697050267.

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 a cyclic number.

It is not a de Polignac number, because 7620507961 - 2⁵ = 7620507929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7620507931) 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, 346386715 + ... + 346386736.

It is an arithmetic number, because the mean of its divisors is an integer number (2078320356).

Almost surely, 2^7620507961 is an apocalyptic number.

It is an amenable number.

7620507961 is a deficient number, since it is larger than the sum of its proper divisors (692773463).

7620507961 is a wasteful number, since it uses less digits than its factorization.

7620507961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692773462.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 7620507961 is about 87295.5208530197. The cubic root of 7620507961 is about 1967.8620041750.

The spelling of 7620507961 in words is "seven billion, six hundred twenty million, five hundred seven thousand, nine hundred sixty-one".