15890424421 has 8 divisors (see below), whose sum is σ = 16232096000. Its totient is φ = 15551371440.

The previous prime is 15890424397. The next prime is 15890424443. The reversal of 15890424421 is 12442409851.

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

It is a cyclic number.

It is not a de Polignac number, because 15890424421 - 2¹⁵ = 15890391653 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 (15890424491) 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, 642381 + ... + 666658.

It is an arithmetic number, because the mean of its divisors is an integer number (2029012000).

Almost surely, 2^15890424421 is an apocalyptic number.

It is an amenable number.

15890424421 is a deficient number, since it is larger than the sum of its proper divisors (341671579).

15890424421 is a wasteful number, since it uses less digits than its factorization.

15890424421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309299.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 15890424421 in words is "fifteen billion, eight hundred ninety million, four hundred twenty-four thousand, four hundred twenty-one".