1021081732653 has 4 divisors (see below), whose sum is σ = 1361442310208. Its totient is φ = 680721155100.

The previous prime is 1021081732613. The next prime is 1021081732663. The reversal of 1021081732653 is 3562371801201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1021081732653 - 2⁶ = 1021081732589 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 (1021081732613) 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, 170180288773 + ... + 170180288778.

It is an arithmetic number, because the mean of its divisors is an integer number (340360577552).

Almost surely, 2^{1021081732653} is an apocalyptic number.

It is an amenable number.

1021081732653 is a deficient number, since it is larger than the sum of its proper divisors (340360577555).

1021081732653 is an equidigital number, since it uses as much as digits as its factorization.

1021081732653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340360577554.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 1021081732653 in words is "one trillion, twenty-one billion, eighty-one million, seven hundred thirty-two thousand, six hundred fifty-three".