72190471478 has 4 divisors (see below), whose sum is σ = 108285707220. Its totient is φ = 36095235738.

The previous prime is 72190471469. The next prime is 72190471489. The reversal of 72190471478 is 87417409127.

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

It is a super-2 number, since 2×72190471478² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18047617868 + ... + 18047617871.

It is an arithmetic number, because the mean of its divisors is an integer number (27071426805).

Almost surely, 2^72190471478 is an apocalyptic number.

72190471478 is a deficient number, since it is larger than the sum of its proper divisors (36095235742).

72190471478 is a wasteful number, since it uses less digits than its factorization.

72190471478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36095235741.

The product of its (nonzero) digits is 790272, while the sum is 50.

The spelling of 72190471478 in words is "seventy-two billion, one hundred ninety million, four hundred seventy-one thousand, four hundred seventy-eight".