76451645 has 4 divisors (see below), whose sum is σ = 91741980. Its totient is φ = 61161312.

The previous prime is 76451633. The next prime is 76451651. The reversal of 76451645 is 54615467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54615467 = 2663 ⋅20509.

It can be written as a sum of positive squares in 2 ways, for example, as 11600836 + 64850809 = 3406^2 + 8053^2 .

It is a cyclic number.

It is not a de Polignac number, because 76451645 - 2⁴ = 76451629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 76451599 and 76451608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7645160 + ... + 7645169.

It is an arithmetic number, because the mean of its divisors is an integer number (22935495).

Almost surely, 2^76451645 is an apocalyptic number.

It is an amenable number.

76451645 is a deficient number, since it is larger than the sum of its proper divisors (15290335).

76451645 is a wasteful number, since it uses less digits than its factorization.

76451645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15290334.

The product of its digits is 100800, while the sum is 38.

The square root of 76451645 is about 8743.6631339502. The cubic root of 76451645 is about 424.4197756928.

The spelling of 76451645 in words is "seventy-six million, four hundred fifty-one thousand, six hundred forty-five".