3990421485537 has 8 divisors (see below), whose sum is σ = 5492193012480. Its totient is φ = 2574465474480.

The previous prime is 3990421485487. The next prime is 3990421485539. The reversal of 3990421485537 is 7355841240993.

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

It is not a de Polignac number, because 3990421485537 - 2²² = 3990417291233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3990421485539) 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, 21453878862 + ... + 21453879047.

It is an arithmetic number, because the mean of its divisors is an integer number (686524126560).

Almost surely, 2^{3990421485537} is an apocalyptic number.

It is an amenable number.

3990421485537 is a deficient number, since it is larger than the sum of its proper divisors (1501771526943).

3990421485537 is a wasteful number, since it uses less digits than its factorization.

3990421485537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42907757943.

The product of its (nonzero) digits is 32659200, while the sum is 60.

The spelling of 3990421485537 in words is "three trillion, nine hundred ninety billion, four hundred twenty-one million, four hundred eighty-five thousand, five hundred thirty-seven".