78691400042 has 8 divisors (see below), whose sum is σ = 118040473632. Its totient is φ = 39344575500.

The previous prime is 78691399961. The next prime is 78691400057. The reversal of 78691400042 is 24000419687.

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

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, 471884 + ... + 616487.

It is an arithmetic number, because the mean of its divisors is an integer number (14755059204).

Almost surely, 2^78691400042 is an apocalyptic number.

78691400042 is a deficient number, since it is larger than the sum of its proper divisors (39349073590).

78691400042 is a wasteful number, since it uses less digits than its factorization.

78691400042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124524.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 78691400042 in words is "seventy-eight billion, six hundred ninety-one million, four hundred thousand, forty-two".