71583896990 has 16 divisors (see below), whose sum is σ = 136430486352. Its totient is φ = 26949231744.

The previous prime is 71583896963. The next prime is 71583896999. The reversal of 71583896990 is 9969838517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71583896999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210540704 + ... + 210541043.

It is an arithmetic number, because the mean of its divisors is an integer number (8526905397).

Almost surely, 2^71583896990 is an apocalyptic number.

71583896990 is a deficient number, since it is larger than the sum of its proper divisors (64846589362).

71583896990 is a wasteful number, since it uses less digits than its factorization.

71583896990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421081771.

The product of its (nonzero) digits is 29393280, while the sum is 65.

The spelling of 71583896990 in words is "seventy-one billion, five hundred eighty-three million, eight hundred ninety-six thousand, nine hundred ninety".