71445878961897 has 32 divisors (see below), whose sum is σ = 105101041812480. Its totient is φ = 42810573734720.

The previous prime is 71445878961889. The next prime is 71445878961911. The reversal of 71445878961897 is 79816987854417.

It is not a de Polignac number, because 71445878961897 - 2³ = 71445878961889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71445878961887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18337122 + ... + 21889307.

It is an arithmetic number, because the mean of its divisors is an integer number (3284407556640).

Almost surely, 2^{71445878961897} is an apocalyptic number.

It is an amenable number.

71445878961897 is a deficient number, since it is larger than the sum of its proper divisors (33655162850583).

71445878961897 is a wasteful number, since it uses less digits than its factorization.

71445878961897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40227053.

The product of its digits is 6827950080, while the sum is 84.

The spelling of 71445878961897 in words is "seventy-one trillion, four hundred forty-five billion, eight hundred seventy-eight million, nine hundred sixty-one thousand, eight hundred ninety-seven".