61533236425664 has 28 divisors (see below), whose sum is σ = 126315533830200. Its totient is φ = 29705700342528.

The previous prime is 61533236425663. The next prime is 61533236425681. The reversal of 61533236425664 is 46652463233516.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61533236425663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16576839854 + ... + 16576843565.

Almost surely, 2^{61533236425664} is an apocalyptic number.

61533236425664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

61533236425664 is an abundant number, since it is smaller than the sum of its proper divisors (64782297404536).

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

61533236425664 is a wasteful number, since it uses less digits than its factorization.

61533236425664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33153683460 (or 33153683450 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 56.

The spelling of 61533236425664 in words is "sixty-one trillion, five hundred thirty-three billion, two hundred thirty-six million, four hundred twenty-five thousand, six hundred sixty-four".