15146999399781 has 18 divisors (see below), whose sum is σ = 23241704965362. Its totient is φ = 9503999621760.

The previous prime is 15146999399767. The next prime is 15146999399837. The reversal of 15146999399781 is 18799399964151.

15146999399781 is a `hidden beast` number, since 1 + 5 + 1 + 4 + 69 + 99 + 399 + 7 + 81 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 3394677276225 + 11752322123556 = 1842465^2 + 3428166^2 .

It is not a de Polignac number, because 15146999399781 - 2¹⁰ = 15146999398757 is a prime.

It is a super-2 number, since 2×15146999399781² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15146999399781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15146999399761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2911761990 + ... + 2911767191.

It is an arithmetic number, because the mean of its divisors is an integer number (1291205831409).

Almost surely, 2^{15146999399781} is an apocalyptic number.

It is an amenable number.

15146999399781 is a deficient number, since it is larger than the sum of its proper divisors (8094705565581).

15146999399781 is a wasteful number, since it uses less digits than its factorization.

15146999399781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5823529221 (or 5823529201 counting only the distinct ones).

The product of its digits is 1190427840, while the sum is 81.

The spelling of 15146999399781 in words is "fifteen trillion, one hundred forty-six billion, nine hundred ninety-nine million, three hundred ninety-nine thousand, seven hundred eighty-one".