61265433735857 has 4 divisors (see below), whose sum is σ = 65978159407860. Its totient is φ = 56552708063856.

The previous prime is 61265433735853. The next prime is 61265433735893. The reversal of 61265433735857 is 75853733456216.

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 8823490030096 + 52441943705761 = 2970436^2 + 7241681^2 .

It is a cyclic number.

It is not a de Polignac number, because 61265433735857 - 2² = 61265433735853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61265433735793 and 61265433735802.

It is not an unprimeable number, because it can be changed into a prime (61265433735851) 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, 2356362835982 + ... + 2356362836007.

It is an arithmetic number, because the mean of its divisors is an integer number (16494539851965).

Almost surely, 2^{61265433735857} is an apocalyptic number.

It is an amenable number.

61265433735857 is a deficient number, since it is larger than the sum of its proper divisors (4712725672003).

61265433735857 is a wasteful number, since it uses less digits than its factorization.

61265433735857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4712725672002.

The product of its digits is 381024000, while the sum is 65.

The spelling of 61265433735857 in words is "sixty-one trillion, two hundred sixty-five billion, four hundred thirty-three million, seven hundred thirty-five thousand, eight hundred fifty-seven".