15642346421 has 8 divisors (see below), whose sum is σ = 16847090400. Its totient is φ = 14437814832.

The previous prime is 15642346393. The next prime is 15642346427. The reversal of 15642346421 is 12464324651.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15642346421 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 (15642346427) 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, 121046 + ... + 214328.

It is an arithmetic number, because the mean of its divisors is an integer number (2105886300).

Almost surely, 2^15642346421 is an apocalyptic number.

It is an amenable number.

15642346421 is a deficient number, since it is larger than the sum of its proper divisors (1204743979).

15642346421 is a wasteful number, since it uses less digits than its factorization.

15642346421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106195.

The product of its digits is 138240, while the sum is 38.

The spelling of 15642346421 in words is "fifteen billion, six hundred forty-two million, three hundred forty-six thousand, four hundred twenty-one".