85040421510 has 32 divisors (see below), whose sum is σ = 222651286272. Its totient is φ = 20615859680.

The previous prime is 85040421509. The next prime is 85040421517. The reversal of 85040421510 is 1512404058.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85040421517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128848794 + ... + 128849453.

It is an arithmetic number, because the mean of its divisors is an integer number (6957852696).

Almost surely, 2^85040421510 is an apocalyptic number.

85040421510 is an abundant number, since it is smaller than the sum of its proper divisors (137610864762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85040421510 is a wasteful number, since it uses less digits than its factorization.

85040421510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257698268.

The product of its (nonzero) digits is 6400, while the sum is 30.

Adding to 85040421510 its reverse (1512404058), we get a palindrome (86552825568).

The spelling of 85040421510 in words is "eighty-five billion, forty million, four hundred twenty-one thousand, five hundred ten".