76614720641 has 4 divisors (see below), whose sum is σ = 81121468932. Its totient is φ = 72107972352.

The previous prime is 76614720613. The next prime is 76614720697. The reversal of 76614720641 is 14602741667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14602741667 = 119839 ⋅121853.

It can be written as a sum of positive squares in 2 ways, for example, as 71996159041 + 4618561600 = 268321^2 + 67960^2 .

It is a cyclic number.

It is not a de Polignac number, because 76614720641 - 2¹⁰ = 76614719617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76614720592 and 76614720601.

It is not an unprimeable number, because it can be changed into a prime (76614726641) 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, 2253374120 + ... + 2253374153.

It is an arithmetic number, because the mean of its divisors is an integer number (20280367233).

Almost surely, 2^76614720641 is an apocalyptic number.

It is an amenable number.

76614720641 is a deficient number, since it is larger than the sum of its proper divisors (4506748291).

76614720641 is a wasteful number, since it uses less digits than its factorization.

76614720641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506748290.

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 76614720641 in words is "seventy-six billion, six hundred fourteen million, seven hundred twenty thousand, six hundred forty-one".