70561918 has 16 divisors (see below), whose sum is σ = 121336704. Its totient is φ = 30147480.

The previous prime is 70561903. The next prime is 70561927. The reversal of 70561918 is 81916507.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2980 + ... + 12247.

It is an arithmetic number, because the mean of its divisors is an integer number (7583544).

Almost surely, 2^70561918 is an apocalyptic number.

70561918 is a deficient number, since it is larger than the sum of its proper divisors (50774786).

70561918 is a wasteful number, since it uses less digits than its factorization.

70561918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15567.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 70561918 is about 8400.1141658908. The cubic root of 70561918 is about 413.2283657896.

The spelling of 70561918 in words is "seventy million, five hundred sixty-one thousand, nine hundred eighteen".