61219643529 has 16 divisors (see below), whose sum is σ = 90941368320. Its totient is φ = 36313391760.

The previous prime is 61219643501. The next prime is 61219643567. The reversal of 61219643529 is 92534691216.

It is not a de Polignac number, because 61219643529 - 2¹² = 61219639433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61219643579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19733989 + ... + 19737090.

It is an arithmetic number, because the mean of its divisors is an integer number (5683835520).

Almost surely, 2^61219643529 is an apocalyptic number.

It is an amenable number.

61219643529 is a deficient number, since it is larger than the sum of its proper divisors (29721724791).

61219643529 is a wasteful number, since it uses less digits than its factorization.

61219643529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39471140.

The product of its digits is 699840, while the sum is 48.

The spelling of 61219643529 in words is "sixty-one billion, two hundred nineteen million, six hundred forty-three thousand, five hundred twenty-nine".