61402640320559 has 2 divisors, whose sum is σ = 61402640320560. Its totient is φ = 61402640320558.

The previous prime is 61402640320531. The next prime is 61402640320583. The reversal of 61402640320559 is 95502304620416.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61402640320559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61402640320159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30701320160279 + 30701320160280.

It is an arithmetic number, because the mean of its divisors is an integer number (30701320160280).

Almost surely, 2^{61402640320559} is an apocalyptic number.

61402640320559 is a deficient number, since it is larger than the sum of its proper divisors (1).

61402640320559 is an equidigital number, since it uses as much as digits as its factorization.

61402640320559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 61402640320559 in words is "sixty-one trillion, four hundred two billion, six hundred forty million, three hundred twenty thousand, five hundred fifty-nine".