61673140672 has 56 divisors (see below), whose sum is σ = 143778226032. Its totient is φ = 25876838400.

The previous prime is 61673140603. The next prime is 61673140709. The reversal of 61673140672 is 27604137616.

It is a super-3 number, since 3×61673140672³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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, 3360229 + ... + 3378532.

It is an arithmetic number, because the mean of its divisors is an integer number (2567468322).

Almost surely, 2^61673140672 is an apocalyptic number.

It is an amenable number.

61673140672 is an abundant number, since it is smaller than the sum of its proper divisors (82105085360).

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

61673140672 is a wasteful number, since it uses less digits than its factorization.

61673140672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6738797 (or 6738787 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 61673140672 in words is "sixty-one billion, six hundred seventy-three million, one hundred forty thousand, six hundred seventy-two".