76861661455811 has 8 divisors (see below), whose sum is σ = 81425611590480. Its totient is φ = 72302453091328.

The previous prime is 76861661455801. The next prime is 76861661455847. The reversal of 76861661455811 is 11855416616867.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76861661455811 - 2²⁶ = 76861594346947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76861661455801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1185409166 + ... + 1185474003.

It is an arithmetic number, because the mean of its divisors is an integer number (10178201448810).

Almost surely, 2^{76861661455811} is an apocalyptic number.

76861661455811 is a deficient number, since it is larger than the sum of its proper divisors (4563950134669).

76861661455811 is a wasteful number, since it uses less digits than its factorization.

76861661455811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370885093.

The product of its digits is 58060800, while the sum is 65.

The spelling of 76861661455811 in words is "seventy-six trillion, eight hundred sixty-one billion, six hundred sixty-one million, four hundred fifty-five thousand, eight hundred eleven".