78154916250 has 40 divisors (see below), whose sum is σ = 195324776064. Its totient is φ = 20841310000.

The previous prime is 78154916249. The next prime is 78154916267. The reversal of 78154916250 is 5261945187.

It is a happy number.

It is a super-2 number, since 2×78154916250² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78154916250.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10416906 + ... + 10424405.

Almost surely, 2^78154916250 is an apocalyptic number.

78154916250 is an abundant number, since it is smaller than the sum of its proper divisors (117169859814).

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

78154916250 is a wasteful number, since it uses less digits than its factorization.

78154916250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20841336 (or 20841321 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 78154916250 in words is "seventy-eight billion, one hundred fifty-four million, nine hundred sixteen thousand, two hundred fifty".