2465951981 has 2 divisors, whose sum is σ = 2465951982. Its totient is φ = 2465951980.

The previous prime is 2465951953. The next prime is 2465952001. The reversal of 2465951981 is 1891595642.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2463533956 + 2418025 = 49634^2 + 1555^2 .

It is a cyclic number.

It is not a de Polignac number, because 2465951981 - 2²² = 2461757677 is a prime.

It is a super-2 number, since 2×2465951981² = 12161838345195648722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2465951911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1232975990 + 1232975991.

It is an arithmetic number, because the mean of its divisors is an integer number (1232975991).

Almost surely, 2^2465951981 is an apocalyptic number.

It is an amenable number.

2465951981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2465951981 is an equidigital number, since it uses as much as digits as its factorization.

2465951981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 50.

The square root of 2465951981 is about 49658.3525804069. The cubic root of 2465951981 is about 1351.0192542260.

The spelling of 2465951981 in words is "two billion, four hundred sixty-five million, nine hundred fifty-one thousand, nine hundred eighty-one".