1399889778560 has 512 divisors, whose sum is σ = 4268406240000. Its totient is φ = 427178852352.

The previous prime is 1399889778533. The next prime is 1399889778569. The reversal of 1399889778560 is 658779889931.

It is a Harshad number since it is a multiple of its sum of digits (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399889778569) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 243498566 + ... + 243504314.

Almost surely, 2^{1399889778560} is an apocalyptic number.

1399889778560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1399889778560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2134203120000).

1399889778560 is an abundant number, since it is smaller than the sum of its proper divisors (2868516461440).

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

1399889778560 is a wasteful number, since it uses less digits than its factorization.

1399889778560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5938 (or 5926 counting only the distinct ones).

The product of its (nonzero) digits is 1646023680, while the sum is 80.

The spelling of 1399889778560 in words is "one trillion, three hundred ninety-nine billion, eight hundred eighty-nine million, seven hundred seventy-eight thousand, five hundred sixty".