61566341755 has 32 divisors (see below), whose sum is σ = 79940203776. Its totient is φ = 45340944384.

The previous prime is 61566341737. The next prime is 61566341803. The reversal of 61566341755 is 55714366516.

It is a cyclic number.

It is not a de Polignac number, because 61566341755 - 2²³ = 61557953147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61566341699 and 61566341708.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7974157 + ... + 7981873.

It is an arithmetic number, because the mean of its divisors is an integer number (2498131368).

Almost surely, 2^61566341755 is an apocalyptic number.

61566341755 is a deficient number, since it is larger than the sum of its proper divisors (18373862021).

61566341755 is a wasteful number, since it uses less digits than its factorization.

61566341755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9783.

The product of its digits is 2268000, while the sum is 49.

The spelling of 61566341755 in words is "sixty-one billion, five hundred sixty-six million, three hundred forty-one thousand, seven hundred fifty-five".