61009191427 has 2 divisors, whose sum is σ = 61009191428. Its totient is φ = 61009191426.

The previous prime is 61009191307. The next prime is 61009191461. The reversal of 61009191427 is 72419190016.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61009191427 - 2¹⁵ = 61009158659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61009191427.

It is not a weakly prime, because it can be changed into another prime (61009191527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30504595713 + 30504595714.

It is an arithmetic number, because the mean of its divisors is an integer number (30504595714).

Almost surely, 2^61009191427 is an apocalyptic number.

61009191427 is a deficient number, since it is larger than the sum of its proper divisors (1).

61009191427 is an equidigital number, since it uses as much as digits as its factorization.

61009191427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The spelling of 61009191427 in words is "sixty-one billion, nine million, one hundred ninety-one thousand, four hundred twenty-seven".