61544430487 has 2 divisors, whose sum is σ = 61544430488. Its totient is φ = 61544430486.

The previous prime is 61544430413. The next prime is 61544430491. The reversal of 61544430487 is 78403444516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61544430487 - 2³¹ = 59396946839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61544430287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30772215243 + 30772215244.

It is an arithmetic number, because the mean of its divisors is an integer number (30772215244).

Almost surely, 2^61544430487 is an apocalyptic number.

61544430487 is a deficient number, since it is larger than the sum of its proper divisors (1).

61544430487 is an equidigital number, since it uses as much as digits as its factorization.

61544430487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 46.

The spelling of 61544430487 in words is "sixty-one billion, five hundred forty-four million, four hundred thirty thousand, four hundred eighty-seven".