61888399813 has 4 divisors (see below), whose sum is σ = 62760067488. Its totient is φ = 61016732140.

The previous prime is 61888399799. The next prime is 61888399817. The reversal of 61888399813 is 31899388816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61888399813 - 2⁹ = 61888399301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61888399817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435833731 + ... + 435833872.

It is an arithmetic number, because the mean of its divisors is an integer number (15690016872).

Almost surely, 2^61888399813 is an apocalyptic number.

It is an amenable number.

61888399813 is a deficient number, since it is larger than the sum of its proper divisors (871667675).

61888399813 is an equidigital number, since it uses as much as digits as its factorization.

61888399813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871667674.

The product of its digits is 17915904, while the sum is 64.

The spelling of 61888399813 in words is "sixty-one billion, eight hundred eighty-eight million, three hundred ninety-nine thousand, eight hundred thirteen".