61745472771644 has 12 divisors (see below), whose sum is σ = 108056058527424. Its totient is φ = 30872313192384.

The previous prime is 61745472771629. The next prime is 61745472771673. The reversal of 61745472771644 is 44617727454716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105469964 + ... + 106053779.

It is an arithmetic number, because the mean of its divisors is an integer number (9004671543952).

Almost surely, 2^{61745472771644} is an apocalyptic number.

It is an amenable number.

61745472771644 is a deficient number, since it is larger than the sum of its proper divisors (46310585755780).

61745472771644 is a wasteful number, since it uses less digits than its factorization.

61745472771644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211596724 (or 211596722 counting only the distinct ones).

The product of its digits is 221276160, while the sum is 65.

The spelling of 61745472771644 in words is "sixty-one trillion, seven hundred forty-five billion, four hundred seventy-two million, seven hundred seventy-one thousand, six hundred forty-four".