78791081450 has 24 divisors (see below), whose sum is σ = 148198064940. Its totient is φ = 31162313600.

The previous prime is 78791081431. The next prime is 78791081477. The reversal of 78791081450 is 5418019787.

It can be written as a sum of positive squares in 6 ways, for example, as 10352859001 + 68438222449 = 101749^2 + 261607^2 .

It is a Harshad number since it is a multiple of its sum of digits (50).

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, 8848481 + ... + 8857380.

Almost surely, 2^78791081450 is an apocalyptic number.

78791081450 is a deficient number, since it is larger than the sum of its proper divisors (69406983490).

78791081450 is a wasteful number, since it uses less digits than its factorization.

78791081450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17705962 (or 17705957 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 50.

The spelling of 78791081450 in words is "seventy-eight billion, seven hundred ninety-one million, eighty-one thousand, four hundred fifty".