15420456603 has 6 divisors (see below), whose sum is σ = 22273992884. Its totient is φ = 10280304396.

The previous prime is 15420456599. The next prime is 15420456617. The reversal of 15420456603 is 30665402451.

15420456603 is a `hidden beast` number, since 1 + 5 + 4 + 2 + 0 + 45 + 6 + 603 = 666.

It is not a de Polignac number, because 15420456603 - 2² = 15420456599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15420456673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 856692025 + ... + 856692042.

Almost surely, 2^15420456603 is an apocalyptic number.

15420456603 is a deficient number, since it is larger than the sum of its proper divisors (6853536281).

15420456603 is a wasteful number, since it uses less digits than its factorization.

15420456603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713384073 (or 1713384070 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 15420456603 in words is "fifteen billion, four hundred twenty million, four hundred fifty-six thousand, six hundred three".