38461636235781 has 24 divisors (see below), whose sum is σ = 60606457352064. Its totient is φ = 23309989229760.

The previous prime is 38461636235741. The next prime is 38461636235807. The reversal of 38461636235781 is 18753263616483.

38461636235781 is a `hidden beast` number, since 3 + 8 + 4 + 6 + 1 + 6 + 36 + 23 + 578 + 1 = 666.

It is not a de Polignac number, because 38461636235781 - 2¹¹ = 38461636233733 is a prime.

It is a super-2 number, since 2×38461636235781² (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 (38461636235741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30318625 + ... + 31561721.

It is an arithmetic number, because the mean of its divisors is an integer number (2525269056336).

Almost surely, 2^{38461636235781} is an apocalyptic number.

It is an amenable number.

38461636235781 is a deficient number, since it is larger than the sum of its proper divisors (22144821116283).

38461636235781 is a wasteful number, since it uses less digits than its factorization.

38461636235781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555641 (or 1555638 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 63.

The spelling of 38461636235781 in words is "thirty-eight trillion, four hundred sixty-one billion, six hundred thirty-six million, two hundred thirty-five thousand, seven hundred eighty-one".