61009190357 has 2 divisors, whose sum is σ = 61009190358. Its totient is φ = 61009190356.

The previous prime is 61009190327. The next prime is 61009190371. The reversal of 61009190357 is 75309190016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49990699396 + 11018490961 = 223586^2 + 104969^2 .

It is a cyclic number.

It is not a de Polignac number, because 61009190357 - 2⁸ = 61009190101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61009190327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30504595178 + 30504595179.

It is an arithmetic number, because the mean of its divisors is an integer number (30504595179).

Almost surely, 2^61009190357 is an apocalyptic number.

It is an amenable number.

61009190357 is a deficient number, since it is larger than the sum of its proper divisors (1).

61009190357 is an equidigital number, since it uses as much as digits as its factorization.

61009190357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 41.

The spelling of 61009190357 in words is "sixty-one billion, nine million, one hundred ninety thousand, three hundred fifty-seven".