40507403081 has 8 divisors (see below), whose sum is σ = 41562667944. Its totient is φ = 39455342080.

The previous prime is 40507403063. The next prime is 40507403093. The reversal of 40507403081 is 18030470504.

40507403081 = 142315² + 142316².

It can be written as a sum of positive squares in 4 ways, for example, as 11578836025 + 28928567056 = 107605^2 + 170084^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40507403081 - 2⁶ = 40507403017 is a prime.

It is a super-2 number, since 2×40507403081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40507402081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775340 + ... + 825933.

It is an arithmetic number, because the mean of its divisors is an integer number (5195333493).

Almost surely, 2^40507403081 is an apocalyptic number.

40507403081 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

40507403081 is the 142316-th centered square number.

It is an amenable number.

40507403081 is a deficient number, since it is larger than the sum of its proper divisors (1055264863).

40507403081 is a wasteful number, since it uses less digits than its factorization.

40507403081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601931.

The product of its (nonzero) digits is 13440, while the sum is 32.

Adding to 40507403081 its reverse (18030470504), we get a palindrome (58537873585).

The spelling of 40507403081 in words is "forty billion, five hundred seven million, four hundred three thousand, eighty-one".