61074727399 has 4 divisors (see below), whose sum is σ = 69799688464. Its totient is φ = 52349766336.

The previous prime is 61074727393. The next prime is 61074727411. The reversal of 61074727399 is 99372747016.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61074727399 - 2¹⁵ = 61074694631 is a prime.

It is a super-2 number, since 2×61074727399² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61074727393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4362480522 + ... + 4362480535.

It is an arithmetic number, because the mean of its divisors is an integer number (17449922116).

Almost surely, 2^61074727399 is an apocalyptic number.

61074727399 is a deficient number, since it is larger than the sum of its proper divisors (8724961065).

61074727399 is an equidigital number, since it uses as much as digits as its factorization.

61074727399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8724961064.

The product of its (nonzero) digits is 4000752, while the sum is 55.

The spelling of 61074727399 in words is "sixty-one billion, seventy-four million, seven hundred twenty-seven thousand, three hundred ninety-nine".