71989978025049 has 12 divisors (see below), whose sum is σ = 111657925100304. Its totient is φ = 41137130299944.

The previous prime is 71989978025033. The next prime is 71989978025051. The reversal of 71989978025049 is 94052087998917.

It is not a de Polignac number, because 71989978025049 - 2⁴ = 71989978025033 is a prime.

It is a hoax number, since the sum of its digits (78) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (71989978020049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 244863870687 + ... + 244863870980.

It is an arithmetic number, because the mean of its divisors is an integer number (9304827091692).

Almost surely, 2^{71989978025049} is an apocalyptic number.

It is an amenable number.

71989978025049 is a deficient number, since it is larger than the sum of its proper divisors (39667947075255).

71989978025049 is a wasteful number, since it uses less digits than its factorization.

71989978025049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489727741684 (or 489727741677 counting only the distinct ones).

The product of its (nonzero) digits is 823011840, while the sum is 78.

The spelling of 71989978025049 in words is "seventy-one trillion, nine hundred eighty-nine billion, nine hundred seventy-eight million, twenty-five thousand, forty-nine".