61361000245 has 4 divisors (see below), whose sum is σ = 73633200300. Its totient is φ = 49088800192.

The previous prime is 61361000203. The next prime is 61361000291. The reversal of 61361000245 is 54200016316.

61361000245 = 175158² + 175159².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30680324964 + 30680675281 = 175158^2 + 175159^2 .

It is a cyclic number.

It is not a de Polignac number, because 61361000245 - 2¹¹ = 61360998197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6136100020 + ... + 6136100029.

It is an arithmetic number, because the mean of its divisors is an integer number (18408300075).

Almost surely, 2^61361000245 is an apocalyptic number.

61361000245 is the 175159-th centered square number.

It is an amenable number.

61361000245 is a deficient number, since it is larger than the sum of its proper divisors (12272200055).

61361000245 is a wasteful number, since it uses less digits than its factorization.

61361000245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12272200054.

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 61361000245 in words is "sixty-one billion, three hundred sixty-one million, two hundred forty-five", and thus it is an aban number.