76961553 has 4 divisors (see below), whose sum is σ = 102615408. Its totient is φ = 51307700.

The previous prime is 76961543. The next prime is 76961579. The reversal of 76961553 is 35516967.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 76961553 - 2²⁴ = 60184337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76961503) 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, 12826923 + ... + 12826928.

It is an arithmetic number, because the mean of its divisors is an integer number (25653852).

Almost surely, 2^76961553 is an apocalyptic number.

It is an amenable number.

76961553 is a deficient number, since it is larger than the sum of its proper divisors (25653855).

76961553 is a wasteful number, since it uses less digits than its factorization.

76961553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25653854.

The product of its digits is 170100, while the sum is 42.

The square root of 76961553 is about 8772.7733927191. The cubic root of 76961553 is about 425.3612669854.

The spelling of 76961553 in words is "seventy-six million, nine hundred sixty-one thousand, five hundred fifty-three".