1397430559881 has 16 divisors (see below), whose sum is σ = 2070347097600. Its totient is φ = 931584552624.

The previous prime is 1397430559873. The next prime is 1397430559927. The reversal of 1397430559881 is 1889550347931.

1397430559881 is a `hidden beast` number, since 1 + 3 + 9 + 7 + 4 + 30 + 5 + 598 + 8 + 1 = 666.

It is not a de Polignac number, because 1397430559881 - 2³ = 1397430559873 is a prime.

It is a super-2 number, since 2×1397430559881² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1397430559381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270201 + ... + 1693478.

It is an arithmetic number, because the mean of its divisors is an integer number (129396693600).

Almost surely, 2^{1397430559881} is an apocalyptic number.

It is an amenable number.

1397430559881 is a deficient number, since it is larger than the sum of its proper divisors (672916537719).

1397430559881 is a wasteful number, since it uses less digits than its factorization.

1397430559881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990045 (or 1990039 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 63.

The spelling of 1397430559881 in words is "one trillion, three hundred ninety-seven billion, four hundred thirty million, five hundred fifty-nine thousand, eight hundred eighty-one".