40845741752521 has 4 divisors (see below), whose sum is σ = 42621643567872. Its totient is φ = 39069839937172.

The previous prime is 40845741752513. The next prime is 40845741752603. The reversal of 40845741752521 is 12525714754804.

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 40845741752521 - 2³ = 40845741752513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40845741750521) 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, 887950907641 + ... + 887950907686.

It is an arithmetic number, because the mean of its divisors is an integer number (10655410891968).

Almost surely, 2^{40845741752521} is an apocalyptic number.

It is an amenable number.

40845741752521 is a deficient number, since it is larger than the sum of its proper divisors (1775901815351).

40845741752521 is a wasteful number, since it uses less digits than its factorization.

40845741752521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775901815350.

The product of its (nonzero) digits is 12544000, while the sum is 55.

The spelling of 40845741752521 in words is "forty trillion, eight hundred forty-five billion, seven hundred forty-one million, seven hundred fifty-two thousand, five hundred twenty-one".