2051478696901 has 2 divisors, whose sum is σ = 2051478696902. Its totient is φ = 2051478696900.

The previous prime is 2051478696877. The next prime is 2051478696989. The reversal of 2051478696901 is 1096968741502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1996077306276 + 55401390625 = 1412826^2 + 235375^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051478696901 - 2⁹ = 2051478696389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051478696301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025739348450 + 1025739348451.

It is an arithmetic number, because the mean of its divisors is an integer number (1025739348451).

Almost surely, 2^{2051478696901} is an apocalyptic number.

It is an amenable number.

2051478696901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051478696901 is an equidigital number, since it uses as much as digits as its factorization.

2051478696901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 2051478696901 in words is "two trillion, fifty-one billion, four hundred seventy-eight million, six hundred ninety-six thousand, nine hundred one".