1650120920401 has 2 divisors, whose sum is σ = 1650120920402. Its totient is φ = 1650120920400.

The previous prime is 1650120920303. The next prime is 1650120920431. The reversal of 1650120920401 is 1040290210561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1580991890625 + 69129029776 = 1257375^2 + 262924^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650120920401 - 2²⁷ = 1649986702673 is a prime.

It is not a weakly prime, because it can be changed into another prime (1650120920431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825060460200 + 825060460201.

It is an arithmetic number, because the mean of its divisors is an integer number (825060460201).

Almost surely, 2^{1650120920401} is an apocalyptic number.

It is an amenable number.

1650120920401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650120920401 is an equidigital number, since it uses as much as digits as its factorization.

1650120920401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 1650120920401 in words is "one trillion, six hundred fifty billion, one hundred twenty million, nine hundred twenty thousand, four hundred one".