61774710145117 has 4 divisors (see below), whose sum is σ = 61777848964156. Its totient is φ = 61771571326080.

The previous prime is 61774710145103. The next prime is 61774710145129. The reversal of 61774710145117 is 71154101747716.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57542025237316 + 4232684907801 = 7585646^2 + 2057349^2 .

It is a cyclic number.

It is not a de Polignac number, because 61774710145117 - 2¹⁹ = 61774709620829 is a prime.

It is a super-2 number, since 2×61774710145117² (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 (61774710145177) 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, 1569379998 + ... + 1569419359.

It is an arithmetic number, because the mean of its divisors is an integer number (15444462241039).

Almost surely, 2^{61774710145117} is an apocalyptic number.

It is an amenable number.

61774710145117 is a deficient number, since it is larger than the sum of its proper divisors (3138819039).

61774710145117 is a wasteful number, since it uses less digits than its factorization.

61774710145117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138819038.

The product of its (nonzero) digits is 1152480, while the sum is 52.

The spelling of 61774710145117 in words is "sixty-one trillion, seven hundred seventy-four billion, seven hundred ten million, one hundred forty-five thousand, one hundred seventeen".