15222778956001 has 2 divisors, whose sum is σ = 15222778956002. Its totient is φ = 15222778956000.

The previous prime is 15222778955981. The next prime is 15222778956043. The reversal of 15222778956001 is 10065987722251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14999749448401 + 223029507600 = 3872951^2 + 472260^2 .

It is a cyclic number.

It is not a de Polignac number, because 15222778956001 - 2²³ = 15222770567393 is a prime.

It is not a weakly prime, because it can be changed into another prime (15222778956601) 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, 7611389478000 + 7611389478001.

It is an arithmetic number, because the mean of its divisors is an integer number (7611389478001).

Almost surely, 2^{15222778956001} is an apocalyptic number.

It is an amenable number.

15222778956001 is a deficient number, since it is larger than the sum of its proper divisors (1).

15222778956001 is an equidigital number, since it uses as much as digits as its factorization.

15222778956001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4233600, while the sum is 55.

The spelling of 15222778956001 in words is "fifteen trillion, two hundred twenty-two billion, seven hundred seventy-eight million, nine hundred fifty-six thousand, one".