2556029030381 has 2 divisors, whose sum is σ = 2556029030382. Its totient is φ = 2556029030380.

The previous prime is 2556029030351. The next prime is 2556029030431. The reversal of 2556029030381 is 1830309206552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2086482025156 + 469547005225 = 1444466^2 + 685235^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556029030381 - 2¹⁴ = 2556029013997 is a prime.

It is a super-2 number, since 2×2556029030381² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556029030351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278014515190 + 1278014515191.

It is an arithmetic number, because the mean of its divisors is an integer number (1278014515191).

Almost surely, 2^{2556029030381} is an apocalyptic number.

It is an amenable number.

2556029030381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556029030381 is an equidigital number, since it uses as much as digits as its factorization.

2556029030381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 2556029030381 in words is "two trillion, five hundred fifty-six billion, twenty-nine million, thirty thousand, three hundred eighty-one".