40565015551 has 4 divisors (see below), whose sum is σ = 40565418952. Its totient is φ = 40564612152.

The previous prime is 40565015549. The next prime is 40565015587. The reversal of 40565015551 is 15551056504.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40565015551 - 2¹ = 40565015549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40565015551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40565013551) 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, 84565 + ... + 297121.

It is an arithmetic number, because the mean of its divisors is an integer number (10141354738).

Almost surely, 2^40565015551 is an apocalyptic number.

40565015551 is a deficient number, since it is larger than the sum of its proper divisors (403401).

40565015551 is a wasteful number, since it uses less digits than its factorization.

40565015551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403400.

The product of its (nonzero) digits is 75000, while the sum is 37.

It can be divided in two parts, 405650 and 15551, that added together give a square (421201 = 649²).

The spelling of 40565015551 in words is "forty billion, five hundred sixty-five million, fifteen thousand, five hundred fifty-one".