13931981758250 has 32 divisors (see below), whose sum is σ = 26142619383504. Its totient is φ = 5559555624000.

The previous prime is 13931981758243. The next prime is 13931981758283. The reversal of 13931981758250 is 5285718913931.

It is a Cunningham number, because it is equal to 3732557²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 1 + 13931981758249 = 1^2 + 3732557^2 .

It is a super-2 number, since 2×13931981758250² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66079937 + ... + 66290436.

Almost surely, 2^{13931981758250} is an apocalyptic number.

13931981758250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13931981758250 is a deficient number, since it is larger than the sum of its proper divisors (12210637625254).

13931981758250 is a wasteful number, since it uses less digits than its factorization.

13931981758250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132370811 (or 132370801 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 62.

The spelling of 13931981758250 in words is "thirteen trillion, nine hundred thirty-one billion, nine hundred eighty-one million, seven hundred fifty-eight thousand, two hundred fifty".