71736436730 has 64 divisors (see below), whose sum is σ = 154043555328. Its totient is φ = 23517542400.

The previous prime is 71736436729. The next prime is 71736436741. The reversal of 71736436730 is 3763463717.

It is a happy number.

It is a super-2 number, since 2×71736436730² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5778530 + ... + 5790930.

It is an arithmetic number, because the mean of its divisors is an integer number (2406930552).

Almost surely, 2^71736436730 is an apocalyptic number.

71736436730 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

71736436730 is an abundant number, since it is smaller than the sum of its proper divisors (82307118598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71736436730 is a wasteful number, since it uses less digits than its factorization.

71736436730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16031.

The product of its (nonzero) digits is 1333584, while the sum is 47.

The spelling of 71736436730 in words is "seventy-one billion, seven hundred thirty-six million, four hundred thirty-six thousand, seven hundred thirty".