77723036361541 has 2 divisors, whose sum is σ = 77723036361542. Its totient is φ = 77723036361540.

The previous prime is 77723036361469. The next prime is 77723036361547. The reversal of 77723036361541 is 14516363032777.

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., 60004451032516 + 17718585329025 = 7746254^2 + 4209345^2 .

It is a cyclic number.

It is not a de Polignac number, because 77723036361541 - 2⁹ = 77723036361029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77723036361547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38861518180770 + 38861518180771.

It is an arithmetic number, because the mean of its divisors is an integer number (38861518180771).

Almost surely, 2^{77723036361541} is an apocalyptic number.

It is an amenable number.

77723036361541 is a deficient number, since it is larger than the sum of its proper divisors (1).

77723036361541 is an equidigital number, since it uses as much as digits as its factorization.

77723036361541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13335840, while the sum is 55.

The spelling of 77723036361541 in words is "seventy-seven trillion, seven hundred twenty-three billion, thirty-six million, three hundred sixty-one thousand, five hundred forty-one".