901427163781 has 2 divisors, whose sum is σ = 901427163782. Its totient is φ = 901427163780.

The previous prime is 901427163761. The next prime is 901427163859. The reversal of 901427163781 is 187361724109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717586881025 + 183840282756 = 847105^2 + 428766^2 .

It is a cyclic number.

It is not a de Polignac number, because 901427163781 - 2⁷ = 901427163653 is a prime.

It is a super-2 number, since 2×901427163781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (901427163761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450713581890 + 450713581891.

It is an arithmetic number, because the mean of its divisors is an integer number (450713581891).

Almost surely, 2^901427163781 is an apocalyptic number.

It is an amenable number.

901427163781 is a deficient number, since it is larger than the sum of its proper divisors (1).

901427163781 is an equidigital number, since it uses as much as digits as its factorization.

901427163781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 901427163781 in words is "nine hundred one billion, four hundred twenty-seven million, one hundred sixty-three thousand, seven hundred eighty-one".