709213491638 has 16 divisors (see below), whose sum is σ = 1065163536720. Its totient is φ = 354159062400.

The previous prime is 709213491619. The next prime is 709213491691. The reversal of 709213491638 is 836194312907.

It is a self number, because there is not a number n which added to its sum of digits gives 709213491638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34282658 + ... + 34303338.

It is an arithmetic number, because the mean of its divisors is an integer number (66572721045).

Almost surely, 2^709213491638 is an apocalyptic number.

709213491638 is a deficient number, since it is larger than the sum of its proper divisors (355950045082).

709213491638 is a wasteful number, since it uses less digits than its factorization.

709213491638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41503.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 709213491638 in words is "seven hundred nine billion, two hundred thirteen million, four hundred ninety-one thousand, six hundred thirty-eight".