78151965494 has 8 divisors (see below), whose sum is σ = 118711846560. Its totient is φ = 38581349976.

The previous prime is 78151965487. The next prime is 78151965503. The reversal of 78151965494 is 49456915187.

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

It is a super-2 number, since 2×78151965494² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247316189 + ... + 247316504.

It is an arithmetic number, because the mean of its divisors is an integer number (14838980820).

Almost surely, 2^78151965494 is an apocalyptic number.

78151965494 is a deficient number, since it is larger than the sum of its proper divisors (40559881066).

78151965494 is a wasteful number, since it uses less digits than its factorization.

78151965494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494632774.

The product of its digits is 10886400, while the sum is 59.

The spelling of 78151965494 in words is "seventy-eight billion, one hundred fifty-one million, nine hundred sixty-five thousand, four hundred ninety-four".