71220277478 has 8 divisors (see below), whose sum is σ = 122091904272. Its totient is φ = 30522976056.

The previous prime is 71220277459. The next prime is 71220277501. The reversal of 71220277478 is 87477202217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2543581325 + ... + 2543581352.

It is an arithmetic number, because the mean of its divisors is an integer number (15261488034).

Almost surely, 2^71220277478 is an apocalyptic number.

71220277478 is a deficient number, since it is larger than the sum of its proper divisors (50871626794).

71220277478 is a wasteful number, since it uses less digits than its factorization.

71220277478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5087162686.

The product of its (nonzero) digits is 614656, while the sum is 47.

The spelling of 71220277478 in words is "seventy-one billion, two hundred twenty million, two hundred seventy-seven thousand, four hundred seventy-eight".