13958512981 has 16 divisors (see below), whose sum is σ = 16044576768. Its totient is φ = 11895609600.

The previous prime is 13958512961. The next prime is 13958513021. The reversal of 13958512981 is 18921585931.

It is a happy number.

It is not a de Polignac number, because 13958512981 - 2¹¹ = 13958510933 is a prime.

It is a super-2 number, since 2×13958512981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13958512951) 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, 1095276 + ... + 1107946.

It is an arithmetic number, because the mean of its divisors is an integer number (1002786048).

Almost surely, 2^13958512981 is an apocalyptic number.

It is an amenable number.

13958512981 is a deficient number, since it is larger than the sum of its proper divisors (2086063787).

13958512981 is a wasteful number, since it uses less digits than its factorization.

13958512981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13572.

The product of its digits is 777600, while the sum is 52.

The spelling of 13958512981 in words is "thirteen billion, nine hundred fifty-eight million, five hundred twelve thousand, nine hundred eighty-one".