61771262520727 has 4 divisors (see below), whose sum is σ = 62936758040040. Its totient is φ = 60605767001416.

The previous prime is 61771262520661. The next prime is 61771262520731. The reversal of 61771262520727 is 72702526217716.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61771262520727 is a prime.

It is a super-2 number, since 2×61771262520727² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61771262529727) 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, 582747759577 + ... + 582747759682.

It is an arithmetic number, because the mean of its divisors is an integer number (15734189510010).

Almost surely, 2^{61771262520727} is an apocalyptic number.

61771262520727 is a deficient number, since it is larger than the sum of its proper divisors (1165495519313).

61771262520727 is a wasteful number, since it uses less digits than its factorization.

61771262520727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165495519312.

The product of its (nonzero) digits is 6914880, while the sum is 55.

The spelling of 61771262520727 in words is "sixty-one trillion, seven hundred seventy-one billion, two hundred sixty-two million, five hundred twenty thousand, seven hundred twenty-seven".