40305665557 has 4 divisors (see below), whose sum is σ = 40516690176. Its totient is φ = 40094640940.

The previous prime is 40305665531. The next prime is 40305665579. The reversal of 40305665557 is 75556650304.

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 40305665557 - 2¹⁵ = 40305632789 is a prime.

It is a super-2 number, since 2×40305665557² (a number of 22 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 (40305665357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105512023 + ... + 105512404.

It is an arithmetic number, because the mean of its divisors is an integer number (10129172544).

Almost surely, 2^40305665557 is an apocalyptic number.

It is an amenable number.

40305665557 is a deficient number, since it is larger than the sum of its proper divisors (211024619).

40305665557 is a wasteful number, since it uses less digits than its factorization.

40305665557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211024618.

The product of its (nonzero) digits is 1890000, while the sum is 46.

The spelling of 40305665557 in words is "forty billion, three hundred five million, six hundred sixty-five thousand, five hundred fifty-seven".