1953984440455 has 8 divisors (see below), whose sum is σ = 2354510713104. Its totient is φ = 1556701296000.

The previous prime is 1953984440437. The next prime is 1953984440459. The reversal of 1953984440455 is 5540444893591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1953984440455 - 2⁵ = 1953984440423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1953984440393 and 1953984440402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1953984440459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810780721 + ... + 810783130.

It is an arithmetic number, because the mean of its divisors is an integer number (294313839138).

Almost surely, 2^{1953984440455} is an apocalyptic number.

1953984440455 is a deficient number, since it is larger than the sum of its proper divisors (400526272649).

1953984440455 is a wasteful number, since it uses less digits than its factorization.

1953984440455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621564097.

The product of its (nonzero) digits is 62208000, while the sum is 61.

The spelling of 1953984440455 in words is "one trillion, nine hundred fifty-three billion, nine hundred eighty-four million, four hundred forty thousand, four hundred fifty-five".