70561765 has 8 divisors (see below), whose sum is σ = 85114008. Its totient is φ = 56156160.

The previous prime is 70561741. The next prime is 70561793. The reversal of 70561765 is 56716507.

It can be written as a sum of positive squares in 4 ways, for example, as 370881 + 70190884 = 609^2 + 8378^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70561765 - 2⁷ = 70561637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35596 + ... + 37525.

It is an arithmetic number, because the mean of its divisors is an integer number (10639251).

Almost surely, 2^70561765 is an apocalyptic number.

It is an amenable number.

70561765 is a deficient number, since it is larger than the sum of its proper divisors (14552243).

70561765 is a wasteful number, since it uses less digits than its factorization.

70561765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73319.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 70561765 is about 8400.1050588668. The cubic root of 70561765 is about 413.2280671205.

The spelling of 70561765 in words is "seventy million, five hundred sixty-one thousand, seven hundred sixty-five".