15406852493 has 2 divisors, whose sum is σ = 15406852494. Its totient is φ = 15406852492.

The previous prime is 15406852477. The next prime is 15406852499. The reversal of 15406852493 is 39425860451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12153519049 + 3253333444 = 110243^2 + 57038^2 .

It is a cyclic number.

It is not a de Polignac number, because 15406852493 - 2⁴ = 15406852477 is a prime.

It is a super-2 number, since 2×15406852493² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15406852499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7703426246 + 7703426247.

It is an arithmetic number, because the mean of its divisors is an integer number (7703426247).

Almost surely, 2^15406852493 is an apocalyptic number.

It is an amenable number.

15406852493 is a deficient number, since it is larger than the sum of its proper divisors (1).

15406852493 is an equidigital number, since it uses as much as digits as its factorization.

15406852493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 15406852493 in words is "fifteen billion, four hundred six million, eight hundred fifty-two thousand, four hundred ninety-three".