61951294443 has 64 divisors (see below), whose sum is σ = 89977651200. Its totient is φ = 37802244480.

The previous prime is 61951294367. The next prime is 61951294463. The reversal of 61951294443 is 34449215916.

It is not a de Polignac number, because 61951294443 - 2¹⁰ = 61951293419 is a prime.

Its product of digits (933120) is a multiple of the sum of its prime divisors (1152).

It is a junction number, because it is equal to n+sod(n) for n = 61951294392 and 61951294401.

It is not an unprimeable number, because it can be changed into a prime (61951294463) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 91508221 + ... + 91508897.

It is an arithmetic number, because the mean of its divisors is an integer number (1405900800).

Almost surely, 2^61951294443 is an apocalyptic number.

61951294443 is a deficient number, since it is larger than the sum of its proper divisors (28026356757).

61951294443 is a wasteful number, since it uses less digits than its factorization.

61951294443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152.

The product of its digits is 933120, while the sum is 48.

The spelling of 61951294443 in words is "sixty-one billion, nine hundred fifty-one million, two hundred ninety-four thousand, four hundred forty-three".