1640287640153 has 4 divisors (see below), whose sum is σ = 1642315190580. Its totient is φ = 1638260089728.

The previous prime is 1640287640143. The next prime is 1640287640177. The reversal of 1640287640153 is 3510467820461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 846100106569 + 794187533584 = 919837^2 + 891172^2 .

It is a cyclic number.

It is not a de Polignac number, because 1640287640153 - 2³⁴ = 1623107770969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1640287640098 and 1640287640107.

It is not an unprimeable number, because it can be changed into a prime (1640287640143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1013774000 + ... + 1013775617.

It is an arithmetic number, because the mean of its divisors is an integer number (410578797645).

Almost surely, 2^{1640287640153} is an apocalyptic number.

It is an amenable number.

1640287640153 is a deficient number, since it is larger than the sum of its proper divisors (2027550427).

1640287640153 is an equidigital number, since it uses as much as digits as its factorization.

1640287640153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027550426.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 1640287640153 in words is "one trillion, six hundred forty billion, two hundred eighty-seven million, six hundred forty thousand, one hundred fifty-three".