38777440644681 has 8 divisors (see below), whose sum is σ = 51703685364864. Its totient is φ = 25851411510480.

The previous prime is 38777440644671. The next prime is 38777440644689. The reversal of 38777440644681 is 18644604477783.

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

It is not a de Polignac number, because 38777440644681 - 2²² = 38777436450377 is a prime.

It is a super-2 number, since 2×38777440644681² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38777440644689) 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, 53476330 + ... + 54196611.

It is an arithmetic number, because the mean of its divisors is an integer number (6462960670608).

Almost surely, 2^{38777440644681} is an apocalyptic number.

It is an amenable number.

38777440644681 is a deficient number, since it is larger than the sum of its proper divisors (12926244720183).

38777440644681 is a wasteful number, since it uses less digits than its factorization.

38777440644681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107792991.

The product of its (nonzero) digits is 606928896, while the sum is 69.

The spelling of 38777440644681 in words is "thirty-eight trillion, seven hundred seventy-seven billion, four hundred forty million, six hundred forty-four thousand, six hundred eighty-one".