76721363451 has 24 divisors (see below), whose sum is σ = 111497939280. Its totient is φ = 50834869056.

The previous prime is 76721363429. The next prime is 76721363489. The reversal of 76721363451 is 15436312767.

76721363451 is a `hidden beast` number, since 7 + 6 + 7 + 2 + 1 + 3 + 634 + 5 + 1 = 666.

It is not a de Polignac number, because 76721363451 - 2¹⁰ = 76721362427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 76721363397 and 76721363406.

It is not an unprimeable number, because it can be changed into a prime (76721365451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3295785 + ... + 3318981.

It is an arithmetic number, because the mean of its divisors is an integer number (4645747470).

Almost surely, 2^76721363451 is an apocalyptic number.

76721363451 is a deficient number, since it is larger than the sum of its proper divisors (34776575829).

76721363451 is a wasteful number, since it uses less digits than its factorization.

76721363451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25435 (or 25432 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The spelling of 76721363451 in words is "seventy-six billion, seven hundred twenty-one million, three hundred sixty-three thousand, four hundred fifty-one".