40825599381 has 96 divisors (see below), whose sum is σ = 71773977600. Its totient is φ = 21870051840.

The previous prime is 40825599377. The next prime is 40825599391. The reversal of 40825599381 is 18399552804.

40825599381 is a `hidden beast` number, since 4 + 0 + 8 + 2 + 559 + 9 + 3 + 81 = 666.

It is not a de Polignac number, because 40825599381 - 2² = 40825599377 is a prime.

It is a super-2 number, since 2×40825599381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40825599341) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8801995 + ... + 8806631.

It is an arithmetic number, because the mean of its divisors is an integer number (747645600).

Almost surely, 2^40825599381 is an apocalyptic number.

It is an amenable number.

40825599381 is a deficient number, since it is larger than the sum of its proper divisors (30948378219).

40825599381 is a wasteful number, since it uses less digits than its factorization.

40825599381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4819 (or 4816 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 40825599381 in words is "forty billion, eight hundred twenty-five million, five hundred ninety-nine thousand, three hundred eighty-one".