40266456521 has 4 divisors (see below), whose sum is σ = 40305973200. Its totient is φ = 40226939844.

The previous prime is 40266456511. The next prime is 40266456541. The reversal of 40266456521 is 12565466204.

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 40266456521 - 2²² = 40262262217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40266456511) 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, 19756811 + ... + 19758848.

It is an arithmetic number, because the mean of its divisors is an integer number (10076493300).

Almost surely, 2^40266456521 is an apocalyptic number.

It is an amenable number.

40266456521 is a deficient number, since it is larger than the sum of its proper divisors (39516679).

40266456521 is a wasteful number, since it uses less digits than its factorization.

40266456521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39516678.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 40266456521 in words is "forty billion, two hundred sixty-six million, four hundred fifty-six thousand, five hundred twenty-one".