61266031636645 has 16 divisors (see below), whose sum is σ = 80283249260928. Its totient is φ = 44512422690240.

The previous prime is 61266031636561. The next prime is 61266031636669. The reversal of 61266031636645 is 54663613066216.

61266031636645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61266031636645 - 2⁹ = 61266031636133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 558585009 + ... + 558694678.

It is an arithmetic number, because the mean of its divisors is an integer number (5017703078808).

Almost surely, 2^{61266031636645} is an apocalyptic number.

It is an amenable number.

61266031636645 is a deficient number, since it is larger than the sum of its proper divisors (19017217624283).

61266031636645 is a wasteful number, since it uses less digits than its factorization.

61266031636645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117280700.

The product of its (nonzero) digits is 16796160, while the sum is 55.

The spelling of 61266031636645 in words is "sixty-one trillion, two hundred sixty-six billion, thirty-one million, six hundred thirty-six thousand, six hundred forty-five".