977678876778 has 8 divisors (see below), whose sum is σ = 1955357753568. Its totient is φ = 325892958924.

The previous prime is 977678876767. The next prime is 977678876789. The reversal of 977678876778 is 877678876779.

It is an interprime number because it is at equal distance from previous prime (977678876767) and next prime (977678876789).

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

977678876778 is an admirable number.

It is a super-2 number, since 2×977678876778² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 977678876694 and 977678876703.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81473239726 + ... + 81473239737.

It is an arithmetic number, because the mean of its divisors is an integer number (244419719196).

Almost surely, 2^977678876778 is an apocalyptic number.

977678876778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

977678876778 is a wasteful number, since it uses less digits than its factorization.

977678876778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162946479468.

The product of its digits is 19516557312, while the sum is 87.

Subtracting from 977678876778 its reverse (877678876779), we obtain a palindrome (99999999999).

The spelling of 977678876778 in words is "nine hundred seventy-seven billion, six hundred seventy-eight million, eight hundred seventy-six thousand, seven hundred seventy-eight".