78472184903 has 4 divisors (see below), whose sum is σ = 89682497040. Its totient is φ = 67261872768.

The previous prime is 78472184899. The next prime is 78472184933. The reversal of 78472184903 is 30948127487.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78472184903 - 2² = 78472184899 is a prime.

It is a super-2 number, since 2×78472184903² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78472184933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5605156058 + ... + 5605156071.

It is an arithmetic number, because the mean of its divisors is an integer number (22420624260).

Almost surely, 2^78472184903 is an apocalyptic number.

78472184903 is a deficient number, since it is larger than the sum of its proper divisors (11210312137).

78472184903 is a wasteful number, since it uses less digits than its factorization.

78472184903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11210312136.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 78472184903 in words is "seventy-eight billion, four hundred seventy-two million, one hundred eighty-four thousand, nine hundred three".