7659213961 has 6 divisors (see below), whose sum is σ = 8909697930. Its totient is φ = 6565040496.

The previous prime is 7659213959. The next prime is 7659213997. The reversal of 7659213961 is 1693129567.

It can be written as a sum of positive squares in only one way, i.e., 5206488336 + 2452725625 = 72156^2 + 49525^2 .

It is not a de Polignac number, because 7659213961 - 2¹ = 7659213959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 156310489 = 7659213961 / (7 + 6 + 5 + 9 + 2 + 1 + 3 + 9 + 6 + 1).

It is not an unprimeable number, because it can be changed into a prime (7659213941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78155196 + ... + 78155293.

It is an arithmetic number, because the mean of its divisors is an integer number (1484949655).

Almost surely, 2^7659213961 is an apocalyptic number.

It is an amenable number.

7659213961 is a deficient number, since it is larger than the sum of its proper divisors (1250483969).

7659213961 is a wasteful number, since it uses less digits than its factorization.

7659213961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156310503 (or 156310496 counting only the distinct ones).

The product of its digits is 612360, while the sum is 49.

The square root of 7659213961 is about 87516.9352811214. The cubic root of 7659213961 is about 1971.1880935664.

The spelling of 7659213961 in words is "seven billion, six hundred fifty-nine million, two hundred thirteen thousand, nine hundred sixty-one".