61433053661 has 12 divisors (see below), whose sum is σ = 71472695580. Its totient is φ = 52649714880.

The previous prime is 61433053639. The next prime is 61433053691. The reversal of 61433053661 is 16635033416.

61433053661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 57345880900 + 4087172761 = 239470^2 + 63931^2 .

It is not a de Polignac number, because 61433053661 - 2²² = 61428859357 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 (61433053631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 294041 + ... + 457521.

It is an arithmetic number, because the mean of its divisors is an integer number (5956057965).

Almost surely, 2^61433053661 is an apocalyptic number.

It is an amenable number.

61433053661 is a deficient number, since it is larger than the sum of its proper divisors (10039641919).

61433053661 is a wasteful number, since it uses less digits than its factorization.

61433053661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171164 (or 171157 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 38.

The spelling of 61433053661 in words is "sixty-one billion, four hundred thirty-three million, fifty-three thousand, six hundred sixty-one".