40445333551 has 16 divisors (see below), whose sum is σ = 47622367296. Its totient is φ = 33623997696.

The previous prime is 40445333531. The next prime is 40445333561. The reversal of 40445333551 is 15533354404.

It is a cyclic number.

It is not a de Polignac number, because 40445333551 - 2¹⁵ = 40445300783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 40445333551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40445333531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164206 + ... + 328411.

It is an arithmetic number, because the mean of its divisors is an integer number (2976397956).

Almost surely, 2^40445333551 is an apocalyptic number.

40445333551 is the 164206-th pentagonal number.

40445333551 is a deficient number, since it is larger than the sum of its proper divisors (7177033745).

40445333551 is a wasteful number, since it uses less digits than its factorization.

40445333551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492978.

The product of its (nonzero) digits is 216000, while the sum is 37.

Adding to 40445333551 its reverse (15533354404), we get a palindrome (55978687955).

The spelling of 40445333551 in words is "forty billion, four hundred forty-five million, three hundred thirty-three thousand, five hundred fifty-one".