40432537125821 has 8 divisors (see below), whose sum is σ = 42823659277944. Its totient is φ = 38042830264320.

The previous prime is 40432537125809. The next prime is 40432537125863. The reversal of 40432537125821 is 12852173523404.

It can be written as a sum of positive squares in 4 ways, for example, as 3427348716100 + 37005188409721 = 1851310^2 + 6083189^2 .

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

It is not a de Polignac number, because 40432537125821 - 2³⁸ = 40157659218877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40432537122821) 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, 353763830 + ... + 353878103.

It is an arithmetic number, because the mean of its divisors is an integer number (5352957409743).

Almost surely, 2^{40432537125821} is an apocalyptic number.

It is an amenable number.

40432537125821 is a deficient number, since it is larger than the sum of its proper divisors (2391122152123).

40432537125821 is a wasteful number, since it uses less digits than its factorization.

40432537125821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707645311.

The product of its (nonzero) digits is 1612800, while the sum is 47.

The spelling of 40432537125821 in words is "forty trillion, four hundred thirty-two billion, five hundred thirty-seven million, one hundred twenty-five thousand, eight hundred twenty-one".