61074727397 has 4 divisors (see below), whose sum is σ = 61082150316. Its totient is φ = 61067304480.

The previous prime is 61074727393. The next prime is 61074727411. The reversal of 61074727397 is 79372747016.

61074727397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51947982241 + 9126745156 = 227921^2 + 95534^2 .

It is a cyclic number.

It is not a de Polignac number, because 61074727397 - 2² = 61074727393 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 (61074727393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3699104 + ... + 3715577.

It is an arithmetic number, because the mean of its divisors is an integer number (15270537579).

Almost surely, 2^61074727397 is an apocalyptic number.

It is an amenable number.

61074727397 is a deficient number, since it is larger than the sum of its proper divisors (7422919).

61074727397 is an equidigital number, since it uses as much as digits as its factorization.

61074727397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7422918.

The product of its (nonzero) digits is 3111696, while the sum is 53.

The spelling of 61074727397 in words is "sixty-one billion, seventy-four million, seven hundred twenty-seven thousand, three hundred ninety-seven".