70818643 has 16 divisors (see below), whose sum is σ = 85432320. Its totient is φ = 57347136.

The previous prime is 70818641. The next prime is 70818659. The reversal of 70818643 is 34681807.

It is a happy number.

It is not a de Polignac number, because 70818643 - 2¹ = 70818641 is a prime.

It is a super-2 number, since 2×70818643² = 10030560392722898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70818641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81630 + ... + 82492.

It is an arithmetic number, because the mean of its divisors is an integer number (5339520).

Almost surely, 2^70818643 is an apocalyptic number.

70818643 is a deficient number, since it is larger than the sum of its proper divisors (14613677).

70818643 is a wasteful number, since it uses less digits than its factorization.

70818643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 70818643 is about 8415.3813341999. The cubic root of 70818643 is about 413.7289079952.

The spelling of 70818643 in words is "seventy million, eight hundred eighteen thousand, six hundred forty-three".