78980491550 has 12 divisors (see below), whose sum is σ = 146903714376. Its totient is φ = 31592196600.

The previous prime is 78980491549. The next prime is 78980491553. The reversal of 78980491550 is 5519408987.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78980491553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 789804866 + ... + 789804965.

It is an arithmetic number, because the mean of its divisors is an integer number (12241976198).

Almost surely, 2^78980491550 is an apocalyptic number.

78980491550 is a deficient number, since it is larger than the sum of its proper divisors (67923222826).

78980491550 is a wasteful number, since it uses less digits than its factorization.

78980491550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579609843 (or 1579609838 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 56.

The spelling of 78980491550 in words is "seventy-eight billion, nine hundred eighty million, four hundred ninety-one thousand, five hundred fifty".