61603753444 has 12 divisors (see below), whose sum is σ = 108157732144. Its totient is φ = 30701544264.

The previous prime is 61603753399. The next prime is 61603753457. The reversal of 61603753444 is 44435730616.

It is a super-2 number, since 2×61603753444² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 61603753444.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25081734 + ... + 25084189.

Almost surely, 2^61603753444 is an apocalyptic number.

It is an amenable number.

61603753444 is a deficient number, since it is larger than the sum of its proper divisors (46553978700).

61603753444 is a wasteful number, since it uses less digits than its factorization.

61603753444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50166234 (or 50166232 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 61603753444 in words is "sixty-one billion, six hundred three million, seven hundred fifty-three thousand, four hundred forty-four".