1249118878840 has 32 divisors (see below), whose sum is σ = 3212019974880. Its totient is φ = 428269329792.

The previous prime is 1249118878831. The next prime is 1249118878859. The reversal of 1249118878840 is 488788119421.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2230569147 + ... + 2230569706.

It is an arithmetic number, because the mean of its divisors is an integer number (100375624215).

Almost surely, 2^{1249118878840} is an apocalyptic number.

1249118878840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1249118878840 is an abundant number, since it is smaller than the sum of its proper divisors (1962901096040).

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

1249118878840 is a wasteful number, since it uses less digits than its factorization.

1249118878840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461138871 (or 4461138867 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 61.

The spelling of 1249118878840 in words is "one trillion, two hundred forty-nine billion, one hundred eighteen million, eight hundred seventy-eight thousand, eight hundred forty".