40520554321 has 16 divisors (see below), whose sum is σ = 44153802000. Its totient is φ = 36963618048.

The previous prime is 40520554279. The next prime is 40520554409. The reversal of 40520554321 is 12345502504.

It can be written as a sum of positive squares in 8 ways, for example, as 1686334225 + 38834220096 = 41065^2 + 197064^2 .

It is a cyclic number.

It is not a de Polignac number, because 40520554321 - 2¹⁵ = 40520521553 is a prime.

It is a super-2 number, since 2×40520554321² (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 (40520555321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328495 + ... + 434683.

It is an arithmetic number, because the mean of its divisors is an integer number (2759612625).

Almost surely, 2^40520554321 is an apocalyptic number.

It is an amenable number.

40520554321 is a deficient number, since it is larger than the sum of its proper divisors (3633247679).

40520554321 is a wasteful number, since it uses less digits than its factorization.

40520554321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106548.

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 40520554321 in words is "forty billion, five hundred twenty million, five hundred fifty-four thousand, three hundred twenty-one".