40640553 has 24 divisors (see below), whose sum is σ = 60516456. Its totient is φ = 26265600.

The previous prime is 40640543. The next prime is 40640569. The reversal of 40640553 is 35504604.

It can be written as a sum of positive squares in 4 ways, for example, as 7601049 + 33039504 = 2757^2 + 5748^2 .

It is not a de Polignac number, because 40640553 - 2⁵ = 40640521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40640543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88701 + ... + 89157.

It is an arithmetic number, because the mean of its divisors is an integer number (2521519).

Almost surely, 2^40640553 is an apocalyptic number.

It is an amenable number.

40640553 is a deficient number, since it is larger than the sum of its proper divisors (19875903).

40640553 is a wasteful number, since it uses less digits than its factorization.

40640553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 40640553 is about 6374.9943529387. The cubic root of 40640553 is about 343.8110808043.

The spelling of 40640553 in words is "forty million, six hundred forty thousand, five hundred fifty-three".