78124961378 has 8 divisors (see below), whose sum is σ = 117794631468. Its totient is φ = 38860084224.

The previous prime is 78124961377. The next prime is 78124961389. The reversal of 78124961378 is 87316942187.

It can be written as a sum of positive squares in 2 ways, for example, as 67084626049 + 11040335329 = 259007^2 + 105073^2 .

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

It is a super-2 number, since 2×78124961378² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78124961377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101197751 + ... + 101198522.

Almost surely, 2^78124961378 is an apocalyptic number.

78124961378 is a deficient number, since it is larger than the sum of its proper divisors (39669670090).

78124961378 is a wasteful number, since it uses less digits than its factorization.

78124961378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202396468.

The product of its digits is 4064256, while the sum is 56.

The spelling of 78124961378 in words is "seventy-eight billion, one hundred twenty-four million, nine hundred sixty-one thousand, three hundred seventy-eight".