6354679791978 has 56 divisors (see below), whose sum is σ = 16333133506848. Its totient is φ = 1815622794792.

The previous prime is 6354679791949. The next prime is 6354679792127. The reversal of 6354679791978 is 8791979764536.

6354679791978 is a `hidden beast` number, since 6 + 3 + 5 + 467 + 9 + 79 + 19 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a junction number, because it is equal to n+sod(n) for n = 6354679791897 and 6354679791906.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 311310576 + ... + 311330987.

Almost surely, 2^{6354679791978} is an apocalyptic number.

6354679791978 is an abundant number, since it is smaller than the sum of its proper divisors (9978453714870).

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

6354679791978 is an equidigital number, since it uses as much as digits as its factorization.

6354679791978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622641590 (or 622641575 counting only the distinct ones).

The product of its digits is 4320812160, while the sum is 81.

The spelling of 6354679791978 in words is "six trillion, three hundred fifty-four billion, six hundred seventy-nine million, seven hundred ninety-one thousand, nine hundred seventy-eight".