85261381240 has 32 divisors (see below), whose sum is σ = 219243552480. Its totient is φ = 29232473472.

The previous prime is 85261381213. The next prime is 85261381267. The reversal of 85261381240 is 4218316258.

It is an interprime number because it is at equal distance from previous prime (85261381213) and next prime (85261381267).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 85261381193 and 85261381202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152252187 + ... + 152252746.

It is an arithmetic number, because the mean of its divisors is an integer number (6851361015).

Almost surely, 2^85261381240 is an apocalyptic number.

It is an amenable number.

85261381240 is an abundant number, since it is smaller than the sum of its proper divisors (133982171240).

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

85261381240 is a wasteful number, since it uses less digits than its factorization.

85261381240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304504951 (or 304504947 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

Adding to 85261381240 its reverse (4218316258), we get a palindrome (89479697498).

The spelling of 85261381240 in words is "eighty-five billion, two hundred sixty-one million, three hundred eighty-one thousand, two hundred forty".