1278777160488 has 32 divisors (see below), whose sum is σ = 3249351804960. Its totient is φ = 419271199680.

The previous prime is 1278777160483. The next prime is 1278777160489. The reversal of 1278777160488 is 8840617778721.

It is a happy number.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1278777160483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436739370 + ... + 436742297.

It is an arithmetic number, because the mean of its divisors is an integer number (101542243905).

Almost surely, 2^{1278777160488} is an apocalyptic number.

It is an amenable number.

1278777160488 is an abundant number, since it is smaller than the sum of its proper divisors (1970574644472).

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

1278777160488 is a wasteful number, since it uses less digits than its factorization.

1278777160488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873481737 (or 873481733 counting only the distinct ones).

The product of its (nonzero) digits is 59006976, while the sum is 66.

The spelling of 1278777160488 in words is "one trillion, two hundred seventy-eight billion, seven hundred seventy-seven million, one hundred sixty thousand, four hundred eighty-eight".