71436874618 has 4 divisors (see below), whose sum is σ = 107155311930. Its totient is φ = 35718437308.

The previous prime is 71436874609. The next prime is 71436874631. The reversal of 71436874618 is 81647863417.

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

It can be written as a sum of positive squares in only one way, i.e., 70536454569 + 900420049 = 265587^2 + 30007^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17859218653 + ... + 17859218656.

Almost surely, 2^71436874618 is an apocalyptic number.

71436874618 is a deficient number, since it is larger than the sum of its proper divisors (35718437312).

71436874618 is a wasteful number, since it uses less digits than its factorization.

71436874618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35718437311.

The product of its digits is 5419008, while the sum is 55.

The spelling of 71436874618 in words is "seventy-one billion, four hundred thirty-six million, eight hundred seventy-four thousand, six hundred eighteen".