1329551421157 has 32 divisors (see below), whose sum is σ = 1384595532000. Its totient is φ = 1276053504000.

The previous prime is 1329551421137. The next prime is 1329551421169. The reversal of 1329551421157 is 7511241559231.

It can be written as a sum of positive squares in 16 ways, for example, as 1085751496036 + 243799925121 = 1041994^2 + 493761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1329551421157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329551421137) 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 31 ways as a sum of consecutive naturals, for example, 173816469 + ... + 173824117.

It is an arithmetic number, because the mean of its divisors is an integer number (43268610375).

Almost surely, 2^{1329551421157} is an apocalyptic number.

It is an amenable number.

1329551421157 is a deficient number, since it is larger than the sum of its proper divisors (55044110843).

1329551421157 is a wasteful number, since it uses less digits than its factorization.

1329551421157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8217.

The product of its digits is 378000, while the sum is 46.

The spelling of 1329551421157 in words is "one trillion, three hundred twenty-nine billion, five hundred fifty-one million, four hundred twenty-one thousand, one hundred fifty-seven".