76878671561 has 8 divisors (see below), whose sum is σ = 78129886464. Its totient is φ = 75632135040.

The previous prime is 76878671533. The next prime is 76878671593. The reversal of 76878671561 is 16517687867.

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 76878671561 - 2⁶ = 76878671497 is a prime.

It is a super-2 number, since 2×76878671561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76878671494 and 76878671503.

It is not an unprimeable number, because it can be changed into a prime (76878671501) 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, 1136456 + ... + 1202201.

It is an arithmetic number, because the mean of its divisors is an integer number (9766235808).

Almost surely, 2^76878671561 is an apocalyptic number.

76878671561 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

76878671561 is a deficient number, since it is larger than the sum of its proper divisors (1251214903).

76878671561 is a wasteful number, since it uses less digits than its factorization.

76878671561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339191.

The product of its digits is 23708160, while the sum is 62.

The spelling of 76878671561 in words is "seventy-six billion, eight hundred seventy-eight million, six hundred seventy-one thousand, five hundred sixty-one".