61561010246 has 4 divisors (see below), whose sum is σ = 92341515372. Its totient is φ = 30780505122.

The previous prime is 61561010207. The next prime is 61561010257. The reversal of 61561010246 is 64201016516.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15390252560 + ... + 15390252563.

It is an arithmetic number, because the mean of its divisors is an integer number (23085378843).

Almost surely, 2^61561010246 is an apocalyptic number.

61561010246 is a deficient number, since it is larger than the sum of its proper divisors (30780505126).

61561010246 is a wasteful number, since it uses less digits than its factorization.

61561010246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30780505125.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 61561010246 in words is "sixty-one billion, five hundred sixty-one million, ten thousand, two hundred forty-six".