1399857136020 has 576 divisors, whose sum is σ = 5198996275200. Its totient is φ = 304171515648.

The previous prime is 1399857136019. The next prime is 1399857136037. The reversal of 1399857136020 is 206317589931.

1399857136020 is a `hidden beast` number, since 1 + 3 + 9 + 9 + 8 + 571 + 3 + 60 + 2 + 0 = 666.

It is a super-2 number, since 2×1399857136020² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 237140389 + ... + 237146291.

It is an arithmetic number, because the mean of its divisors is an integer number (9026035200).

Almost surely, 2^{1399857136020} is an apocalyptic number.

1399857136020 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 1399857136020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2599498137600).

1399857136020 is an abundant number, since it is smaller than the sum of its proper divisors (3799139139180).

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

1399857136020 is a wasteful number, since it uses less digits than its factorization.

1399857136020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6129 (or 6110 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 1399857136020 in words is "one trillion, three hundred ninety-nine billion, eight hundred fifty-seven million, one hundred thirty-six thousand, twenty".