61335927770641 has 2 divisors, whose sum is σ = 61335927770642. Its totient is φ = 61335927770640.

The previous prime is 61335927770603. The next prime is 61335927770653. The reversal of 61335927770641 is 14607772953316.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59485432782400 + 1850494988241 = 7712680^2 + 1360329^2 .

It is a cyclic number.

It is not a de Polignac number, because 61335927770641 - 2²³ = 61335919382033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61335927770641.

It is not a weakly prime, because it can be changed into another prime (61335927770441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30667963885320 + 30667963885321.

It is an arithmetic number, because the mean of its divisors is an integer number (30667963885321).

Almost surely, 2^{61335927770641} is an apocalyptic number.

It is an amenable number.

61335927770641 is a deficient number, since it is larger than the sum of its proper divisors (1).

61335927770641 is an equidigital number, since it uses as much as digits as its factorization.

61335927770641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40007520, while the sum is 61.

The spelling of 61335927770641 in words is "sixty-one trillion, three hundred thirty-five billion, nine hundred twenty-seven million, seven hundred seventy thousand, six hundred forty-one".