13993011077428 has 24 divisors (see below), whose sum is σ = 25085211870600. Its totient is φ = 6825810132480.

The previous prime is 13993011077413. The next prime is 13993011077443. The reversal of 13993011077428 is 82477011039931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13993011077413) and next prime (13993011077443).

It can be written as a sum of positive squares in 4 ways, for example, as 3559968956944 + 10433042120484 = 1886788^2 + 3230022^2 .

It is a super-2 number, since 2×13993011077428² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35106598 + ... + 35502946.

It is an arithmetic number, because the mean of its divisors is an integer number (1045217161275).

Almost surely, 2^{13993011077428} is an apocalyptic number.

It is an amenable number.

13993011077428 is a deficient number, since it is larger than the sum of its proper divisors (11092200793172).

13993011077428 is a wasteful number, since it uses less digits than its factorization.

13993011077428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611667 (or 611665 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 13993011077428 in words is "thirteen trillion, nine hundred ninety-three billion, eleven million, seventy-seven thousand, four hundred twenty-eight".