61285727157245 has 16 divisors (see below), whose sum is σ = 74933872710192. Its totient is φ = 48101332231680.

The previous prime is 61285727157217. The next prime is 61285727157251. The reversal of 61285727157245 is 54275172758216.

It can be written as a sum of positive squares in 8 ways, for example, as 2510152247716 + 58775574909529 = 1584346^2 + 7666523^2 .

It is not a de Polignac number, because 61285727157245 - 2⁶ = 61285727157181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620705 + ... + 11088585.

It is an arithmetic number, because the mean of its divisors is an integer number (4683367044387).

Almost surely, 2^{61285727157245} is an apocalyptic number.

It is an amenable number.

61285727157245 is a deficient number, since it is larger than the sum of its proper divisors (13648145552947).

61285727157245 is a wasteful number, since it uses less digits than its factorization.

61285727157245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10490032.

The product of its digits is 65856000, while the sum is 62.

The spelling of 61285727157245 in words is "sixty-one trillion, two hundred eighty-five billion, seven hundred twenty-seven million, one hundred fifty-seven thousand, two hundred forty-five".