61730007751 has 4 divisors (see below), whose sum is σ = 61986149104. Its totient is φ = 61473866400.

The previous prime is 61730007727. The next prime is 61730007767. The reversal of 61730007751 is 15770003716.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61730007751 - 2¹¹ = 61730005703 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61730007751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61730007151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128070315 + ... + 128070796.

It is an arithmetic number, because the mean of its divisors is an integer number (15496537276).

Almost surely, 2^61730007751 is an apocalyptic number.

61730007751 is a deficient number, since it is larger than the sum of its proper divisors (256141353).

61730007751 is a wasteful number, since it uses less digits than its factorization.

61730007751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256141352.

The product of its (nonzero) digits is 30870, while the sum is 37.

The spelling of 61730007751 in words is "sixty-one billion, seven hundred thirty million, seven thousand, seven hundred fifty-one".