15620663453 has 2 divisors, whose sum is σ = 15620663454. Its totient is φ = 15620663452.

The previous prime is 15620663411. The next prime is 15620663467. The reversal of 15620663453 is 35436602651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14022822724 + 1597840729 = 118418^2 + 39973^2 .

It is a cyclic number.

It is not a de Polignac number, because 15620663453 - 2²⁰ = 15619614877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15620663453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15620663483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7810331726 + 7810331727.

It is an arithmetic number, because the mean of its divisors is an integer number (7810331727).

Almost surely, 2^15620663453 is an apocalyptic number.

It is an amenable number.

15620663453 is a deficient number, since it is larger than the sum of its proper divisors (1).

15620663453 is an equidigital number, since it uses as much as digits as its factorization.

15620663453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 15620663453 in words is "fifteen billion, six hundred twenty million, six hundred sixty-three thousand, four hundred fifty-three".