61507120667727 has 32 divisors (see below), whose sum is σ = 99248208049152. Its totient is φ = 33076183693824.

The previous prime is 61507120667689. The next prime is 61507120667737. The reversal of 61507120667727 is 72776602170516.

It is not a de Polignac number, because 61507120667727 - 2³⁹ = 60957364853839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61507120667737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4919848 + ... + 12133389.

It is an arithmetic number, because the mean of its divisors is an integer number (3101506501536).

Almost surely, 2^{61507120667727} is an apocalyptic number.

61507120667727 is a deficient number, since it is larger than the sum of its proper divisors (37741087381425).

61507120667727 is a wasteful number, since it uses less digits than its factorization.

61507120667727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17063367.

The product of its (nonzero) digits is 10372320, while the sum is 57.

The spelling of 61507120667727 in words is "sixty-one trillion, five hundred seven billion, one hundred twenty million, six hundred sixty-seven thousand, seven hundred twenty-seven".