78749042290 has 8 divisors (see below), whose sum is σ = 141748276140. Its totient is φ = 31499616912.

The previous prime is 78749042287. The next prime is 78749042321. The reversal of 78749042290 is 9224094787.

It can be written as a sum of positive squares in 2 ways, for example, as 71399580849 + 7349461441 = 267207^2 + 85729^2 .

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, 3937452105 + ... + 3937452124.

Almost surely, 2^78749042290 is an apocalyptic number.

78749042290 is a deficient number, since it is larger than the sum of its proper divisors (62999233850).

78749042290 is a wasteful number, since it uses less digits than its factorization.

78749042290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7874904236.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 78749042290 in words is "seventy-eight billion, seven hundred forty-nine million, forty-two thousand, two hundred ninety".