61515305550654 has 32 divisors (see below), whose sum is σ = 125903864929920. Its totient is φ = 20026317703392.

The previous prime is 61515305550653. The next prime is 61515305550667. The reversal of 61515305550654 is 45605550351516.

It is a junction number, because it is equal to n+sod(n) for n = 61515305550597 and 61515305550606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61515305550653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8740492 + ... + 14121855.

It is an arithmetic number, because the mean of its divisors is an integer number (3934495779060).

Almost surely, 2^{61515305550654} is an apocalyptic number.

61515305550654 is an abundant number, since it is smaller than the sum of its proper divisors (64388559379266).

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

61515305550654 is a wasteful number, since it uses less digits than its factorization.

61515305550654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22872824.

The product of its (nonzero) digits is 6750000, while the sum is 51.

The spelling of 61515305550654 in words is "sixty-one trillion, five hundred fifteen billion, three hundred five million, five hundred fifty thousand, six hundred fifty-four".