39781355609332 has 24 divisors (see below), whose sum is σ = 70011006156000. Its totient is φ = 19778225946336.

The previous prime is 39781355609297. The next prime is 39781355609339. The reversal of 39781355609332 is 23390655318793.

It is a super-2 number, since 2×39781355609332² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39781355609339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8823294 + ... + 12546442.

It is an arithmetic number, because the mean of its divisors is an integer number (2917125256500).

Almost surely, 2^{39781355609332} is an apocalyptic number.

It is an amenable number.

39781355609332 is a deficient number, since it is larger than the sum of its proper divisors (30229650546668).

39781355609332 is a wasteful number, since it uses less digits than its factorization.

39781355609332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3738255 (or 3738253 counting only the distinct ones).

The product of its (nonzero) digits is 110224800, while the sum is 64.

The spelling of 39781355609332 in words is "thirty-nine trillion, seven hundred eighty-one billion, three hundred fifty-five million, six hundred nine thousand, three hundred thirty-two".