61919000629 has 4 divisors (see below), whose sum is σ = 61919500140. Its totient is φ = 61918501120.

The previous prime is 61919000599. The next prime is 61919000677. The reversal of 61919000629 is 92600091916.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 48000428100 + 13918572529 = 219090^2 + 117977^2 .

It is a cyclic number.

It is not a de Polignac number, because 61919000629 - 2⁵ = 61919000597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61919000729) by changing a digit.

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, 92757 + ... + 363925.

It is an arithmetic number, because the mean of its divisors is an integer number (15479875035).

Almost surely, 2^61919000629 is an apocalyptic number.

It is an amenable number.

61919000629 is a deficient number, since it is larger than the sum of its proper divisors (499511).

61919000629 is a wasteful number, since it uses less digits than its factorization.

61919000629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499510.

The product of its (nonzero) digits is 52488, while the sum is 43.

The spelling of 61919000629 in words is "sixty-one billion, nine hundred nineteen million, six hundred twenty-nine", and thus it is an aban number.