61215992443 has 18 divisors (see below), whose sum is σ = 62851159068. Its totient is φ = 59610062160.

The previous prime is 61215992437. The next prime is 61215992449. The reversal of 61215992443 is 34429951216.

61215992443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61215992437) and next prime (61215992449).

It is not a de Polignac number, because 61215992443 - 2⁹ = 61215991931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61215992393 and 61215992402.

It is not an unprimeable number, because it can be changed into a prime (61215992449) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 338209813 + ... + 338209993.

Almost surely, 2^61215992443 is an apocalyptic number.

61215992443 is a deficient number, since it is larger than the sum of its proper divisors (1635166625).

61215992443 is an frugal number, since it uses more digits than its factorization.

61215992443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763 (or 415 counting only the distinct ones).

The product of its digits is 466560, while the sum is 46.

The spelling of 61215992443 in words is "sixty-one billion, two hundred fifteen million, nine hundred ninety-two thousand, four hundred forty-three".