40154545425221 has 4 divisors (see below), whose sum is σ = 40285341990432. Its totient is φ = 40023748860012.

The previous prime is 40154545425193. The next prime is 40154545425257. The reversal of 40154545425221 is 12252454545104.

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 40154545425221 - 2³⁰ = 40153471683397 is a prime.

It is a super-2 number, since 2×40154545425221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40154545455221) 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, 65398282145 + ... + 65398282758.

It is an arithmetic number, because the mean of its divisors is an integer number (10071335497608).

Almost surely, 2^{40154545425221} is an apocalyptic number.

It is an amenable number.

40154545425221 is a deficient number, since it is larger than the sum of its proper divisors (130796565211).

40154545425221 is a wasteful number, since it uses less digits than its factorization.

40154545425221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130796565210.

The product of its (nonzero) digits is 1280000, while the sum is 44.

The spelling of 40154545425221 in words is "forty trillion, one hundred fifty-four billion, five hundred forty-five million, four hundred twenty-five thousand, two hundred twenty-one".