61443425264 has 20 divisors (see below), whose sum is σ = 128204070456. Its totient is φ = 28358503872.

The previous prime is 61443425237. The next prime is 61443425333. The reversal of 61443425264 is 46252434416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147700334 + ... + 147700749.

Almost surely, 2^61443425264 is an apocalyptic number.

It is an amenable number.

61443425264 is an abundant number, since it is smaller than the sum of its proper divisors (66760645192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61443425264 is a wasteful number, since it uses less digits than its factorization.

61443425264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295401104 (or 295401098 counting only the distinct ones).

The product of its digits is 552960, while the sum is 41.

The spelling of 61443425264 in words is "sixty-one billion, four hundred forty-three million, four hundred twenty-five thousand, two hundred sixty-four".