1640153261331 has 12 divisors (see below), whose sum is σ = 2551349517808. Its totient is φ = 1009325083824.

The previous prime is 1640153261309. The next prime is 1640153261399. The reversal of 1640153261331 is 1331623510461.

1640153261331 is a `hidden beast` number, since 1 + 6 + 4 + 0 + 1 + 5 + 3 + 2 + 613 + 31 = 666.

It is not a de Polignac number, because 1640153261331 - 2⁶ = 1640153261267 is a prime.

It is a super-2 number, since 2×1640153261331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1640153261231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7009201855 + ... + 7009202088.

Almost surely, 2^{1640153261331} is an apocalyptic number.

1640153261331 is a deficient number, since it is larger than the sum of its proper divisors (911196256477).

1640153261331 is a wasteful number, since it uses less digits than its factorization.

1640153261331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14018403962 (or 14018403959 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

Adding to 1640153261331 its reverse (1331623510461), we get a palindrome (2971776771792).

The spelling of 1640153261331 in words is "one trillion, six hundred forty billion, one hundred fifty-three million, two hundred sixty-one thousand, three hundred thirty-one".