13781733970 has 8 divisors (see below), whose sum is σ = 24807121164. Its totient is φ = 5512693584.

The previous prime is 13781733947. The next prime is 13781733983. The reversal of 13781733970 is 7933718731.

It can be written as a sum of positive squares in 2 ways, for example, as 12468178921 + 1313555049 = 111661^2 + 36243^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689086689 + ... + 689086708.

Almost surely, 2^13781733970 is an apocalyptic number.

13781733970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13781733970 is a deficient number, since it is larger than the sum of its proper divisors (11025387194).

13781733970 is a wasteful number, since it uses less digits than its factorization.

13781733970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378173404.

The product of its (nonzero) digits is 666792, while the sum is 49.

The spelling of 13781733970 in words is "thirteen billion, seven hundred eighty-one million, seven hundred thirty-three thousand, nine hundred seventy".