85021619447 has 8 divisors (see below), whose sum is σ = 86634298656. Its totient is φ = 83409255072.

The previous prime is 85021619429. The next prime is 85021619483. The reversal of 85021619447 is 74491612058.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85021619447 - 2⁶ = 85021619383 is a prime.

It is a super-4 number, since 4×85021619447⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85021619747) 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, 507518 + ... + 653924.

It is an arithmetic number, because the mean of its divisors is an integer number (10829287332).

Almost surely, 2^85021619447 is an apocalyptic number.

85021619447 is a deficient number, since it is larger than the sum of its proper divisors (1612679209).

85021619447 is a wasteful number, since it uses less digits than its factorization.

85021619447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157417.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 85021619447 in words is "eighty-five billion, twenty-one million, six hundred nineteen thousand, four hundred forty-seven".