61862557399 has 2 divisors, whose sum is σ = 61862557400. Its totient is φ = 61862557398.

The previous prime is 61862557381. The next prime is 61862557409. The reversal of 61862557399 is 99375526816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61862557399 - 2⁷ = 61862557271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61862557319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30931278699 + 30931278700.

It is an arithmetic number, because the mean of its divisors is an integer number (30931278700).

Almost surely, 2^61862557399 is an apocalyptic number.

61862557399 is a deficient number, since it is larger than the sum of its proper divisors (1).

61862557399 is an equidigital number, since it uses as much as digits as its factorization.

61862557399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24494400, while the sum is 61.

The spelling of 61862557399 in words is "sixty-one billion, eight hundred sixty-two million, five hundred fifty-seven thousand, three hundred ninety-nine".