61139453201 has 2 divisors, whose sum is σ = 61139453202. Its totient is φ = 61139453200.

The previous prime is 61139453099. The next prime is 61139453239. The reversal of 61139453201 is 10235493116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38986107601 + 22153345600 = 197449^2 + 148840^2 .

It is a cyclic number.

It is not a de Polignac number, because 61139453201 - 2¹⁴ = 61139436817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (61139453281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30569726600 + 30569726601.

It is an arithmetic number, because the mean of its divisors is an integer number (30569726601).

Almost surely, 2^61139453201 is an apocalyptic number.

It is an amenable number.

61139453201 is a deficient number, since it is larger than the sum of its proper divisors (1).

61139453201 is an equidigital number, since it uses as much as digits as its factorization.

61139453201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The spelling of 61139453201 in words is "sixty-one billion, one hundred thirty-nine million, four hundred fifty-three thousand, two hundred one".