61513071227664 has 40 divisors (see below), whose sum is σ = 181610019816000. Its totient is φ = 17575163207808.

The previous prime is 61513071227627. The next prime is 61513071227677. The reversal of 61513071227664 is 46672217031516.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91537308039 + ... + 91537308710.

It is an arithmetic number, because the mean of its divisors is an integer number (4540250495400).

Almost surely, 2^{61513071227664} is an apocalyptic number.

It is an amenable number.

61513071227664 is an abundant number, since it is smaller than the sum of its proper divisors (120096948588336).

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

61513071227664 is a wasteful number, since it uses less digits than its factorization.

61513071227664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183074616767 (or 183074616761 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 61513071227664 in words is "sixty-one trillion, five hundred thirteen billion, seventy-one million, two hundred twenty-seven thousand, six hundred sixty-four".