3991632094437 has 32 divisors (see below), whose sum is σ = 6054056042496. Its totient is φ = 2321868024000.

The previous prime is 3991632094427. The next prime is 3991632094507. The reversal of 3991632094437 is 7344902361993.

It is a happy number.

3991632094437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3991632094437 - 2³⁴ = 3974452225253 is a prime.

It is a super-2 number, since 2×3991632094437² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991632094427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38338689 + ... + 38442662.

It is an arithmetic number, because the mean of its divisors is an integer number (189189251328).

Almost surely, 2^{3991632094437} is an apocalyptic number.

It is an amenable number.

3991632094437 is a deficient number, since it is larger than the sum of its proper divisors (2062423948059).

3991632094437 is a wasteful number, since it uses less digits than its factorization.

3991632094437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76781441.

The product of its (nonzero) digits is 26453952, while the sum is 60.

The spelling of 3991632094437 in words is "three trillion, nine hundred ninety-one billion, six hundred thirty-two million, ninety-four thousand, four hundred thirty-seven".