15641203421 has 8 divisors (see below), whose sum is σ = 15715111104. Its totient is φ = 15567456960.

The previous prime is 15641203381. The next prime is 15641203433. The reversal of 15641203421 is 12430214651.

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 15641203421 - 2¹⁰ = 15641202397 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 (15641203121) 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, 156440 + ... + 236126.

It is an arithmetic number, because the mean of its divisors is an integer number (1964388888).

Almost surely, 2^15641203421 is an apocalyptic number.

It is an amenable number.

15641203421 is a deficient number, since it is larger than the sum of its proper divisors (73907683).

15641203421 is an equidigital number, since it uses as much as digits as its factorization.

15641203421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80611.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 15641203421 in words is "fifteen billion, six hundred forty-one million, two hundred three thousand, four hundred twenty-one".