78215582902 has 16 divisors (see below), whose sum is σ = 118134936000. Its totient is φ = 38837378560.

The previous prime is 78215582881. The next prime is 78215582903. The reversal of 78215582902 is 20928551287.

It is a super-2 number, since 2×78215582902² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78215582903) 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, 1597299 + ... + 1645537.

It is an arithmetic number, because the mean of its divisors is an integer number (7383433500).

Almost surely, 2^78215582902 is an apocalyptic number.

78215582902 is a deficient number, since it is larger than the sum of its proper divisors (39919353098).

78215582902 is a wasteful number, since it uses less digits than its factorization.

78215582902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53831.

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 78215582902 in words is "seventy-eight billion, two hundred fifteen million, five hundred eighty-two thousand, nine hundred two".