19651425346463 has 2 divisors, whose sum is σ = 19651425346464. Its totient is φ = 19651425346462.

The previous prime is 19651425346363. The next prime is 19651425346477. The reversal of 19651425346463 is 36464352415691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19651425346463 is a prime.

It is a super-2 number, since 2×19651425346463² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19651425346363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9825712673231 + 9825712673232.

It is an arithmetic number, because the mean of its divisors is an integer number (9825712673232).

Almost surely, 2^{19651425346463} is an apocalyptic number.

19651425346463 is a deficient number, since it is larger than the sum of its proper divisors (1).

19651425346463 is an equidigital number, since it uses as much as digits as its factorization.

19651425346463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55987200, while the sum is 59.

The spelling of 19651425346463 in words is "nineteen trillion, six hundred fifty-one billion, four hundred twenty-five million, three hundred forty-six thousand, four hundred sixty-three".