85212378004 has 12 divisors (see below), whose sum is σ = 160592558644. Its totient is φ = 39328789824.

The previous prime is 85212377983. The next prime is 85212378007. The reversal of 85212378004 is 40087321258.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28378771600 + 56833606404 = 168460^2 + 238398^2 .

It is a super-2 number, since 2×85212378004² (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 (85212378007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819349737 + ... + 819349840.

Almost surely, 2^85212378004 is an apocalyptic number.

It is an amenable number.

85212378004 is a deficient number, since it is larger than the sum of its proper divisors (75380180640).

85212378004 is a wasteful number, since it uses less digits than its factorization.

85212378004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638699594 (or 1638699592 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 85212378004 in words is "eighty-five billion, two hundred twelve million, three hundred seventy-eight thousand, four".