192939497478 has 64 divisors (see below), whose sum is σ = 527697784320. Its totient is φ = 50885140896.

The previous prime is 192939497437. The next prime is 192939497551. The reversal of 192939497478 is 874794939291.

192939497478 is a `hidden beast` number, since 1 + 9 + 2 + 93 + 9 + 497 + 47 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19626700 + ... + 19636527.

It is an arithmetic number, because the mean of its divisors is an integer number (8245277880).

Almost surely, 2^192939497478 is an apocalyptic number.

192939497478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

192939497478 is an abundant number, since it is smaller than the sum of its proper divisors (334758286842).

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

192939497478 is a wasteful number, since it uses less digits than its factorization.

192939497478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39263258 (or 39263252 counting only the distinct ones).

The product of its digits is 246903552, while the sum is 72.

The spelling of 192939497478 in words is "one hundred ninety-two billion, nine hundred thirty-nine million, four hundred ninety-seven thousand, four hundred seventy-eight".