1623144640651 has 2 divisors, whose sum is σ = 1623144640652. Its totient is φ = 1623144640650.

The previous prime is 1623144640633. The next prime is 1623144640661. The reversal of 1623144640651 is 1560464413261.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1623144640651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1623144640598 and 1623144640607.

It is not a weakly prime, because it can be changed into another prime (1623144640661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811572320325 + 811572320326.

It is an arithmetic number, because the mean of its divisors is an integer number (811572320326).

Almost surely, 2^{1623144640651} is an apocalyptic number.

1623144640651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623144640651 is an equidigital number, since it uses as much as digits as its factorization.

1623144640651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 1623144640651 in words is "one trillion, six hundred twenty-three billion, one hundred forty-four million, six hundred forty thousand, six hundred fifty-one".