68763561 has 4 divisors (see below), whose sum is σ = 91684752. Its totient is φ = 45842372.

The previous prime is 68763559. The next prime is 68763581. The reversal of 68763561 is 16536786.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68763561 - 2¹ = 68763559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68763511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11460591 + ... + 11460596.

It is an arithmetic number, because the mean of its divisors is an integer number (22921188).

Almost surely, 2^68763561 is an apocalyptic number.

It is an amenable number.

68763561 is a deficient number, since it is larger than the sum of its proper divisors (22921191).

68763561 is a wasteful number, since it uses less digits than its factorization.

68763561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22921190.

The product of its digits is 181440, while the sum is 42.

The square root of 68763561 is about 8292.3796946353. The cubic root of 68763561 is about 409.6875688404.

The spelling of 68763561 in words is "sixty-eight million, seven hundred sixty-three thousand, five hundred sixty-one".