61840642733 has 16 divisors (see below), whose sum is σ = 65170552320. Its totient is φ = 58602086400.

The previous prime is 61840642727. The next prime is 61840642763. The reversal of 61840642733 is 33724604816.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61840642733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61840642723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404273 + ... + 535833.

It is an arithmetic number, because the mean of its divisors is an integer number (4073159520).

Almost surely, 2^61840642733 is an apocalyptic number.

It is an amenable number.

61840642733 is a deficient number, since it is larger than the sum of its proper divisors (3329909587).

61840642733 is a wasteful number, since it uses less digits than its factorization.

61840642733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131908.

The product of its (nonzero) digits is 580608, while the sum is 44.

The spelling of 61840642733 in words is "sixty-one billion, eight hundred forty million, six hundred forty-two thousand, seven hundred thirty-three".