38681781407896 has 64 divisors (see below), whose sum is σ = 82601550040320. Its totient is φ = 16810089985920.

The previous prime is 38681781407869. The next prime is 38681781407897. The reversal of 38681781407896 is 69870418718683.

It is a super-2 number, since 2×38681781407896² (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 (38681781407897) 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, 371515 + ... + 8803498.

It is an arithmetic number, because the mean of its divisors is an integer number (1290649219380).

Almost surely, 2^{38681781407896} is an apocalyptic number.

It is an amenable number.

38681781407896 is an abundant number, since it is smaller than the sum of its proper divisors (43919768632424).

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

38681781407896 is a wasteful number, since it uses less digits than its factorization.

38681781407896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9177136 (or 9177132 counting only the distinct ones).

The product of its (nonzero) digits is 780337152, while the sum is 76.

The spelling of 38681781407896 in words is "thirty-eight trillion, six hundred eighty-one billion, seven hundred eighty-one million, four hundred seven thousand, eight hundred ninety-six".