61748863619 has 2 divisors, whose sum is σ = 61748863620. Its totient is φ = 61748863618.

The previous prime is 61748863609. The next prime is 61748863639. The reversal of 61748863619 is 91636884716.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61748863619 is a prime.

It is a super-2 number, since 2×61748863619² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61748863609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30874431809 + 30874431810.

It is an arithmetic number, because the mean of its divisors is an integer number (30874431810).

Almost surely, 2^61748863619 is an apocalyptic number.

61748863619 is a deficient number, since it is larger than the sum of its proper divisors (1).

61748863619 is an equidigital number, since it uses as much as digits as its factorization.

61748863619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 59.

The spelling of 61748863619 in words is "sixty-one billion, seven hundred forty-eight million, eight hundred sixty-three thousand, six hundred nineteen".