76291561 has 4 divisors (see below), whose sum is σ = 76320000. Its totient is φ = 76263124.

The previous prime is 76291531. The next prime is 76291571. The reversal of 76291561 is 16519267.

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 76291561 - 2¹⁷ = 76160489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76291561.

It is not an unprimeable number, because it can be changed into a prime (76291531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9721 + ... + 15718.

It is an arithmetic number, because the mean of its divisors is an integer number (19080000).

Almost surely, 2^76291561 is an apocalyptic number.

It is an amenable number.

76291561 is a deficient number, since it is larger than the sum of its proper divisors (28439).

76291561 is a wasteful number, since it uses less digits than its factorization.

76291561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28438.

The product of its digits is 22680, while the sum is 37.

The square root of 76291561 is about 8734.5040500305. The cubic root of 76291561 is about 424.1233343147.

The spelling of 76291561 in words is "seventy-six million, two hundred ninety-one thousand, five hundred sixty-one".