61570681 has 8 divisors (see below), whose sum is σ = 63707904. Its totient is φ = 59442960.

The previous prime is 61570679. The next prime is 61570687. The reversal of 61570681 is 18607516.

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

It is a cyclic number.

It is not a de Polignac number, because 61570681 - 2¹ = 61570679 is a prime.

It is a super-2 number, since 2×61570681² = 7581897517607522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61570687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12351 + ... + 16603.

It is an arithmetic number, because the mean of its divisors is an integer number (7963488).

Almost surely, 2^61570681 is an apocalyptic number.

It is an amenable number.

61570681 is a deficient number, since it is larger than the sum of its proper divisors (2137223).

61570681 is a wasteful number, since it uses less digits than its factorization.

61570681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 61570681 is about 7846.6987325881. The cubic root of 61570681 is about 394.8734968507.

The spelling of 61570681 in words is "sixty-one million, five hundred seventy thousand, six hundred eighty-one".