61030980749 has 2 divisors, whose sum is σ = 61030980750. Its totient is φ = 61030980748.

The previous prime is 61030980727. The next prime is 61030980811. The reversal of 61030980749 is 94708903016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56894175625 + 4136805124 = 238525^2 + 64318^2 .

It is a cyclic number.

It is not a de Polignac number, because 61030980749 - 2²⁴ = 61014203533 is a prime.

It is a super-2 number, since 2×61030980749² (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 (61030980949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30515490374 + 30515490375.

It is an arithmetic number, because the mean of its divisors is an integer number (30515490375).

Almost surely, 2^61030980749 is an apocalyptic number.

It is an amenable number.

61030980749 is a deficient number, since it is larger than the sum of its proper divisors (1).

61030980749 is an equidigital number, since it uses as much as digits as its factorization.

61030980749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 61030980749 in words is "sixty-one billion, thirty million, nine hundred eighty thousand, seven hundred forty-nine".