2546117381 has 2 divisors, whose sum is σ = 2546117382. Its totient is φ = 2546117380.

The previous prime is 2546117309. The next prime is 2546117459. The reversal of 2546117381 is 1837116452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2386322500 + 159794881 = 48850^2 + 12641^2 .

It is a cyclic number.

It is not a de Polignac number, because 2546117381 - 2²² = 2541923077 is a prime.

It is a super-2 number, since 2×2546117381² = 12965427435660598322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2546117881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1273058690 + 1273058691.

It is an arithmetic number, because the mean of its divisors is an integer number (1273058691).

Almost surely, 2^2546117381 is an apocalyptic number.

It is an amenable number.

2546117381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2546117381 is an equidigital number, since it uses as much as digits as its factorization.

2546117381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 2546117381 is about 50459.0663904912. The cubic root of 2546117381 is about 1365.5034671739.

The spelling of 2546117381 in words is "two billion, five hundred forty-six million, one hundred seventeen thousand, three hundred eighty-one".