16215372261493 has 2 divisors, whose sum is σ = 16215372261494. Its totient is φ = 16215372261492.

The previous prime is 16215372261443. The next prime is 16215372261547. The reversal of 16215372261493 is 39416227351261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9264334925169 + 6951037336324 = 3043737^2 + 2636482^2 .

It is a cyclic number.

It is not a de Polignac number, because 16215372261493 - 2⁴¹ = 14016349005941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16215372261493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16215372261443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8107686130746 + 8107686130747.

It is an arithmetic number, because the mean of its divisors is an integer number (8107686130747).

Almost surely, 2^{16215372261493} is an apocalyptic number.

It is an amenable number.

16215372261493 is a deficient number, since it is larger than the sum of its proper divisors (1).

16215372261493 is an equidigital number, since it uses as much as digits as its factorization.

16215372261493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 52.

The spelling of 16215372261493 in words is "sixteen trillion, two hundred fifteen billion, three hundred seventy-two million, two hundred sixty-one thousand, four hundred ninety-three".