61030385149 has 2 divisors, whose sum is σ = 61030385150. Its totient is φ = 61030385148.

The previous prime is 61030385123. The next prime is 61030385173. The reversal of 61030385149 is 94158303016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60314448100 + 715937049 = 245590^2 + 26757^2 .

It is a cyclic number.

It is not a de Polignac number, because 61030385149 - 2¹⁹ = 61029860861 is a prime.

It is a super-2 number, since 2×61030385149² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61030385749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30515192574 + 30515192575.

It is an arithmetic number, because the mean of its divisors is an integer number (30515192575).

Almost surely, 2^61030385149 is an apocalyptic number.

It is an amenable number.

61030385149 is a deficient number, since it is larger than the sum of its proper divisors (1).

61030385149 is an equidigital number, since it uses as much as digits as its factorization.

61030385149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 61030385149 in words is "sixty-one billion, thirty million, three hundred eighty-five thousand, one hundred forty-nine".