61327507729731 has 16 divisors (see below), whose sum is σ = 82081516492800. Its totient is φ = 40729254309440.

The previous prime is 61327507729723. The next prime is 61327507729769. The reversal of 61327507729731 is 13792770572316.

61327507729731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61327507729731 - 2³ = 61327507729723 is a prime.

It is a super-2 number, since 2×61327507729731² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61327507729231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193518295 + ... + 193834943.

It is an arithmetic number, because the mean of its divisors is an integer number (5130094780800).

Almost surely, 2^{61327507729731} is an apocalyptic number.

61327507729731 is a deficient number, since it is larger than the sum of its proper divisors (20754008763069).

61327507729731 is a wasteful number, since it uses less digits than its factorization.

61327507729731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562386.

The product of its (nonzero) digits is 23337720, while the sum is 60.

The spelling of 61327507729731 in words is "sixty-one trillion, three hundred twenty-seven billion, five hundred seven million, seven hundred twenty-nine thousand, seven hundred thirty-one".