78641010 has 64 divisors (see below), whose sum is σ = 239673600. Its totient is φ = 17974656.

The previous prime is 78640999. The next prime is 78641033. The reversal of 78641010 is 1014687.

It is a happy number.

78641010 is a `hidden beast` number, since 7 + 8 + 641 + 0 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18915 + ... + 22694.

It is an arithmetic number, because the mean of its divisors is an integer number (3744900).

Almost surely, 2^78641010 is an apocalyptic number.

78641010 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78641010 is an abundant number, since it is smaller than the sum of its proper divisors (161032590).

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

78641010 is a wasteful number, since it uses less digits than its factorization.

78641010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41632 (or 41626 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 78641010 is about 8867.9766576147. The cubic root of 78641010 is about 428.4331110784.

Adding to 78641010 its reverse (1014687), we get a palindrome (79655697).

The spelling of 78641010 in words is "seventy-eight million, six hundred forty-one thousand, ten".