40551085129 has 9 divisors (see below), whose sum is σ = 40738213557. Its totient is φ = 40364815104.

The previous prime is 40551085087. The next prime is 40551085139. The reversal of 40551085129 is 92158015504.

The square root of 40551085129 is 201373.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 26661991225 + 13889093904 = 163285^2 + 117852^2 .

It is not a de Polignac number, because 40551085129 - 2³⁵ = 6191346761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40551085091 and 40551085100.

It is not an unprimeable number, because it can be changed into a prime (40551085139) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 70278889 + ... + 70279465.

It is an arithmetic number, because the mean of its divisors is an integer number (4526468173).

Almost surely, 2^40551085129 is an apocalyptic number.

40551085129 is the 201373-rd square number.

40551085129 is the 100687-th centered octagonal number.

It is an amenable number.

40551085129 is a deficient number, since it is larger than the sum of its proper divisors (187128428).

40551085129 is an frugal number, since it uses more digits than its factorization.

40551085129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 40.

The spelling of 40551085129 in words is "forty billion, five hundred fifty-one million, eighty-five thousand, one hundred twenty-nine".