40366404543551 has 4 divisors (see below), whose sum is σ = 40403001466272. Its totient is φ = 40329807620832.

The previous prime is 40366404543541. The next prime is 40366404543593. The reversal of 40366404543551 is 15534540466304.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40366404543551 is a prime.

It is a super-2 number, since 2×40366404543551² (a number of 28 digits) contains 22 as substring.

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 40366404543551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40366404543541) 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, 18298459706 + ... + 18298461911.

It is an arithmetic number, because the mean of its divisors is an integer number (10100750366568).

Almost surely, 2^{40366404543551} is an apocalyptic number.

40366404543551 is a deficient number, since it is larger than the sum of its proper divisors (36596922721).

40366404543551 is a wasteful number, since it uses less digits than its factorization.

40366404543551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36596922720.

The product of its (nonzero) digits is 10368000, while the sum is 50.

The spelling of 40366404543551 in words is "forty trillion, three hundred sixty-six billion, four hundred four million, five hundred forty-three thousand, five hundred fifty-one".