40244374253521 has 4 divisors (see below), whose sum is σ = 41994129655872. Its totient is φ = 38494618851172.

The previous prime is 40244374253411. The next prime is 40244374253527. The reversal of 40244374253521 is 12535247344204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40244374253521 - 2⁴⁵ = 5060002164689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40244374253527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874877701141 + ... + 874877701186.

It is an arithmetic number, because the mean of its divisors is an integer number (10498532413968).

Almost surely, 2^{40244374253521} is an apocalyptic number.

It is an amenable number.

40244374253521 is a deficient number, since it is larger than the sum of its proper divisors (1749755402351).

40244374253521 is a wasteful number, since it uses less digits than its factorization.

40244374253521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749755402350.

The product of its (nonzero) digits is 3225600, while the sum is 46.

The spelling of 40244374253521 in words is "forty trillion, two hundred forty-four billion, three hundred seventy-four million, two hundred fifty-three thousand, five hundred twenty-one".