76816537 has 4 divisors (see below), whose sum is σ = 87790336. Its totient is φ = 65842740.

The previous prime is 76816511. The next prime is 76816547. The reversal of 76816537 is 73561867.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73561867 = 853 ⋅86239.

It is a cyclic number.

It is not a de Polignac number, because 76816537 - 2⁷ = 76816409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76816493 and 76816502.

It is not an unprimeable number, because it can be changed into a prime (76816547) 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, 5486889 + ... + 5486902.

It is an arithmetic number, because the mean of its divisors is an integer number (21947584).

Almost surely, 2^76816537 is an apocalyptic number.

It is an amenable number.

76816537 is a deficient number, since it is larger than the sum of its proper divisors (10973799).

76816537 is a wasteful number, since it uses less digits than its factorization.

76816537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10973798.

The product of its digits is 211680, while the sum is 43.

The square root of 76816537 is about 8764.5043784575. The cubic root of 76816537 is about 425.0939344848.

The spelling of 76816537 in words is "seventy-six million, eight hundred sixteen thousand, five hundred thirty-seven".