354057998778 has 32 divisors (see below), whose sum is σ = 858322422720. Its totient is φ = 107290302480.

The previous prime is 354057998753. The next prime is 354057998821. The reversal of 354057998778 is 877899750453.

354057998778 is a `hidden beast` number, since 3 + 5 + 40 + 579 + 9 + 8 + 7 + 7 + 8 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298028025 + ... + 298029212.

It is an arithmetic number, because the mean of its divisors is an integer number (26822575710).

Almost surely, 2^354057998778 is an apocalyptic number.

354057998778 is an abundant number, since it is smaller than the sum of its proper divisors (504264423942).

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

354057998778 is a wasteful number, since it uses less digits than its factorization.

354057998778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596057259 (or 596057253 counting only the distinct ones).

The product of its (nonzero) digits is 533433600, while the sum is 72.

The spelling of 354057998778 in words is "three hundred fifty-four billion, fifty-seven million, nine hundred ninety-eight thousand, seven hundred seventy-eight".