76629473647 has 4 divisors (see below), whose sum is σ = 79271869320. Its totient is φ = 73987077976.

The previous prime is 76629473617. The next prime is 76629473653. The reversal of 76629473647 is 74637492667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74637492667 = 260543 ⋅286469.

It is a cyclic number.

It is not a de Polignac number, because 76629473647 - 2¹⁵ = 76629440879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76629473617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321197793 + ... + 1321197850.

It is an arithmetic number, because the mean of its divisors is an integer number (19817967330).

Almost surely, 2^76629473647 is an apocalyptic number.

76629473647 is a deficient number, since it is larger than the sum of its proper divisors (2642395673).

76629473647 is a wasteful number, since it uses less digits than its factorization.

76629473647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642395672.

The product of its digits is 64012032, while the sum is 61.

The spelling of 76629473647 in words is "seventy-six billion, six hundred twenty-nine million, four hundred seventy-three thousand, six hundred forty-seven".