78721414850 has 24 divisors (see below), whose sum is σ = 157685050740. Its totient is φ = 29066368320.

The previous prime is 78721414829. The next prime is 78721414883. The reversal of 78721414850 is 5841412787.

It can be written as a sum of positive squares in 6 ways, for example, as 309654409 + 78411760441 = 17597^2 + 280021^2 .

It is a super-3 number, since 3×78721414850³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 78721414795 and 78721414804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60554285 + ... + 60555584.

Almost surely, 2^78721414850 is an apocalyptic number.

78721414850 is an abundant number, since it is smaller than the sum of its proper divisors (78963635890).

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

78721414850 is a wasteful number, since it uses less digits than its factorization.

78721414850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121109894 (or 121109889 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 47.

The spelling of 78721414850 in words is "seventy-eight billion, seven hundred twenty-one million, four hundred fourteen thousand, eight hundred fifty".