1021713634643 has 16 divisors (see below), whose sum is σ = 1174847520000. Its totient is φ = 881135617824.

The previous prime is 1021713634609. The next prime is 1021713634717. The reversal of 1021713634643 is 3464363171201.

It is a cyclic number.

It is not a de Polignac number, because 1021713634643 - 2¹² = 1021713630547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021713634643.

It is not an unprimeable number, because it can be changed into a prime (1021713639643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39720893 + ... + 39746606.

It is an arithmetic number, because the mean of its divisors is an integer number (73427970000).

Almost surely, 2^{1021713634643} is an apocalyptic number.

1021713634643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1021713634643 is a deficient number, since it is larger than the sum of its proper divisors (153133885357).

1021713634643 is a wasteful number, since it uses less digits than its factorization.

1021713634643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79467578.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 1021713634643 in words is "one trillion, twenty-one billion, seven hundred thirteen million, six hundred thirty-four thousand, six hundred forty-three".