2151728149426 has 16 divisors (see below), whose sum is σ = 3343820457240. Its totient is φ = 1037230929280.

The previous prime is 2151728149387. The next prime is 2151728149427. The reversal of 2151728149426 is 6249418271512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2151604917225 + 123232201 = 1466835^2 + 11101^2 .

It is not an unprimeable number, because it can be changed into a prime (2151728149427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27360115 + ... + 27438646.

Almost surely, 2^{2151728149426} is an apocalyptic number.

2151728149426 is a deficient number, since it is larger than the sum of its proper divisors (1192092307814).

2151728149426 is a wasteful number, since it uses less digits than its factorization.

2151728149426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54799469.

The product of its digits is 1935360, while the sum is 52.

The spelling of 2151728149426 in words is "two trillion, one hundred fifty-one billion, seven hundred twenty-eight million, one hundred forty-nine thousand, four hundred twenty-six".