1953278113797 has 6 divisors (see below), whose sum is σ = 2821401719942. Its totient is φ = 1302185409192.

The previous prime is 1953278113783. The next prime is 1953278113817. The reversal of 1953278113797 is 7973118723591.

1953278113797 is a `hidden beast` number, since 1 + 9 + 532 + 7 + 8 + 1 + 1 + 3 + 7 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1809546897636 + 143731216161 = 1345194^2 + 379119^2 .

It is not a de Polignac number, because 1953278113797 - 2⁴ = 1953278113781 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 (1953278113757) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108515450758 + ... + 108515450775.

Almost surely, 2^{1953278113797} is an apocalyptic number.

It is an amenable number.

1953278113797 is a deficient number, since it is larger than the sum of its proper divisors (868123606145).

1953278113797 is a wasteful number, since it uses less digits than its factorization.

1953278113797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217030901539 (or 217030901536 counting only the distinct ones).

The product of its digits is 20003760, while the sum is 63.

The spelling of 1953278113797 in words is "one trillion, nine hundred fifty-three billion, two hundred seventy-eight million, one hundred thirteen thousand, seven hundred ninety-seven".