70387878306 has 64 divisors (see below), whose sum is σ = 148717324800. Its totient is φ = 22148090496.

The previous prime is 70387878283. The next prime is 70387878343. The reversal of 70387878306 is 60387878307.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon 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, 68138766 + ... + 68139798.

It is an arithmetic number, because the mean of its divisors is an integer number (2323708200).

Almost surely, 2^70387878306 is an apocalyptic number.

70387878306 is an abundant number, since it is smaller than the sum of its proper divisors (78329446494).

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

70387878306 is a wasteful number, since it uses less digits than its factorization.

70387878306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623.

The product of its (nonzero) digits is 9483264, while the sum is 57.

Subtracting from 70387878306 its reverse (60387878307), we obtain a palindrome (9999999999).

The spelling of 70387878306 in words is "seventy billion, three hundred eighty-seven million, eight hundred seventy-eight thousand, three hundred six".