40025135025421 has 16 divisors (see below), whose sum is σ = 49263819591168. Its totient is φ = 31666879094400.

The previous prime is 40025135025413. The next prime is 40025135025457. The reversal of 40025135025421 is 12452053152004.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40025135025421 - 2³ = 40025135025413 is a prime.

It is a super-2 number, since 2×40025135025421² (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 (40025135025521) 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, 7307845 + ... + 11552266.

It is an arithmetic number, because the mean of its divisors is an integer number (3078988724448).

Almost surely, 2^{40025135025421} is an apocalyptic number.

It is an amenable number.

40025135025421 is a deficient number, since it is larger than the sum of its proper divisors (9238684565747).

40025135025421 is a wasteful number, since it uses less digits than its factorization.

40025135025421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18883452.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 40025135025421 its reverse (12452053152004), we get a palindrome (52477188177425).

The spelling of 40025135025421 in words is "forty trillion, twenty-five billion, one hundred thirty-five million, twenty-five thousand, four hundred twenty-one".