3835864625781 has 16 divisors (see below), whose sum is σ = 5304722623488. Its totient is φ = 2463493464000.

The previous prime is 3835864625729. The next prime is 3835864625843. The reversal of 3835864625781 is 1875264685383.

It is not a de Polignac number, because 3835864625781 - 2⁶ = 3835864625717 is a prime.

It is a super-2 number, since 2×3835864625781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3835864625881) 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, 171064725 + ... + 171087146.

It is an arithmetic number, because the mean of its divisors is an integer number (331545163968).

Almost surely, 2^{3835864625781} is an apocalyptic number.

It is an amenable number.

3835864625781 is a deficient number, since it is larger than the sum of its proper divisors (1468857997707).

3835864625781 is a wasteful number, since it uses less digits than its factorization.

3835864625781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342152012.

The product of its digits is 232243200, while the sum is 66.

The spelling of 3835864625781 in words is "three trillion, eight hundred thirty-five billion, eight hundred sixty-four million, six hundred twenty-five thousand, seven hundred eighty-one".