76647400425 has 36 divisors (see below), whose sum is σ = 137300882940. Its totient is φ = 40873589760.

The previous prime is 76647400411. The next prime is 76647400439. The reversal of 76647400425 is 52400474667.

It is an interprime number because it is at equal distance from previous prime (76647400411) and next prime (76647400439).

It can be written as a sum of positive squares in 6 ways, for example, as 1077940224 + 75569460201 = 32832^2 + 274899^2 .

It is not a de Polignac number, because 76647400425 - 2⁴ = 76647400409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2472421 + ... + 2503229.

It is an arithmetic number, because the mean of its divisors is an integer number (3813913415).

Almost surely, 2^76647400425 is an apocalyptic number.

76647400425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

76647400425 is a deficient number, since it is larger than the sum of its proper divisors (60653482515).

76647400425 is a wasteful number, since it uses less digits than its factorization.

76647400425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41882 (or 41874 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 45.

The spelling of 76647400425 in words is "seventy-six billion, six hundred forty-seven million, four hundred thousand, four hundred twenty-five".