1953485638481 has 16 divisors (see below), whose sum is σ = 2162934144000. Its totient is φ = 1753006461888.

The previous prime is 1953485638471. The next prime is 1953485638499. The reversal of 1953485638481 is 1848365843591.

It is a cyclic number.

It is not a de Polignac number, because 1953485638481 - 2¹⁰ = 1953485637457 is a prime.

It is a super-2 number, since 2×1953485638481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1953485638471) 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, 10637801 + ... + 10819878.

It is an arithmetic number, because the mean of its divisors is an integer number (135183384000).

Almost surely, 2^{1953485638481} is an apocalyptic number.

It is an amenable number.

1953485638481 is a deficient number, since it is larger than the sum of its proper divisors (209448505519).

1953485638481 is a wasteful number, since it uses less digits than its factorization.

1953485638481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21457888.

The product of its digits is 99532800, while the sum is 65.

The spelling of 1953485638481 in words is "one trillion, nine hundred fifty-three billion, four hundred eighty-five million, six hundred thirty-eight thousand, four hundred eighty-one".