1620417236131 has 2 divisors, whose sum is σ = 1620417236132. Its totient is φ = 1620417236130.

The previous prime is 1620417236059. The next prime is 1620417236147. The reversal of 1620417236131 is 1316327140261.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1620417236131 is a prime.

It is a super-2 number, since 2×1620417236131² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1620417276131) 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, 810208618065 + 810208618066.

It is an arithmetic number, because the mean of its divisors is an integer number (810208618066).

Almost surely, 2^{1620417236131} is an apocalyptic number.

1620417236131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620417236131 is an equidigital number, since it uses as much as digits as its factorization.

1620417236131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 1620417236131 in words is "one trillion, six hundred twenty billion, four hundred seventeen million, two hundred thirty-six thousand, one hundred thirty-one".