38781081752644 has 48 divisors (see below), whose sum is σ = 84613776702336. Its totient is φ = 15109421760000.

The previous prime is 38781081752629. The next prime is 38781081752653. The reversal of 38781081752644 is 44625718018783.

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, 76313394 + ... + 76819894.

It is an arithmetic number, because the mean of its divisors is an integer number (1762787014632).

Almost surely, 2^{38781081752644} is an apocalyptic number.

It is an amenable number.

38781081752644 is an abundant number, since it is smaller than the sum of its proper divisors (45832694949692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38781081752644 is a wasteful number, since it uses less digits than its factorization.

38781081752644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755116 (or 755114 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 64.

The spelling of 38781081752644 in words is "thirty-eight trillion, seven hundred eighty-one billion, eighty-one million, seven hundred fifty-two thousand, six hundred forty-four".