83645443870 has 16 divisors (see below), whose sum is σ = 150621567408. Its totient is φ = 33444895680.

The previous prime is 83645443831. The next prime is 83645443949. The reversal of 83645443870 is 7834454638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1633764 + ... + 1684183.

It is an arithmetic number, because the mean of its divisors is an integer number (9413847963).

Almost surely, 2^83645443870 is an apocalyptic number.

83645443870 is a deficient number, since it is larger than the sum of its proper divisors (66976123538).

83645443870 is a wasteful number, since it uses less digits than its factorization.

83645443870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320475.

The product of its (nonzero) digits is 7741440, while the sum is 52.

The spelling of 83645443870 in words is "eighty-three billion, six hundred forty-five million, four hundred forty-three thousand, eight hundred seventy".