71287793490 has 16 divisors (see below), whose sum is σ = 171090704448. Its totient is φ = 19010078256.

The previous prime is 71287793449. The next prime is 71287793491. The reversal of 71287793490 is 9439778217.

It is a self number, because there is not a number n which added to its sum of digits gives 71287793490.

It is not an unprimeable number, because it can be changed into a prime (71287793491) 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, 1188129862 + ... + 1188129921.

It is an arithmetic number, because the mean of its divisors is an integer number (10693169028).

Almost surely, 2^71287793490 is an apocalyptic number.

71287793490 is an abundant number, since it is smaller than the sum of its proper divisors (99802910958).

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

71287793490 is a wasteful number, since it uses less digits than its factorization.

71287793490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376259793.

The product of its (nonzero) digits is 5334336, while the sum is 57.

The spelling of 71287793490 in words is "seventy-one billion, two hundred eighty-seven million, seven hundred ninety-three thousand, four hundred ninety".