7961340520 has 64 divisors (see below), whose sum is σ = 21362123520. Its totient is φ = 2610921984.

The previous prime is 7961340511. The next prime is 7961340521. The reversal of 7961340520 is 250431697.

It is a self number, because there is not a number n which added to its sum of digits gives 7961340520.

It is not an unprimeable number, because it can be changed into a prime (7961340521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 611677 + ... + 624556.

It is an arithmetic number, because the mean of its divisors is an integer number (333783180).

Almost surely, 2^7961340520 is an apocalyptic number.

7961340520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7961340520 is an abundant number, since it is smaller than the sum of its proper divisors (13400783000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7961340520 is a wasteful number, since it uses less digits than its factorization.

7961340520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236274 (or 1236270 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 7961340520 is about 89226.3443160147. The cubic root of 7961340520 is about 1996.7731732612.

The spelling of 7961340520 in words is "seven billion, nine hundred sixty-one million, three hundred forty thousand, five hundred twenty".