2117578403452 has 12 divisors (see below), whose sum is σ = 3705786219016. Its totient is φ = 1058782340880.

The previous prime is 2117578403419. The next prime is 2117578403453. The reversal of 2117578403452 is 2543048757112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2117578403396 and 2117578403405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117578403453) 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, 986343 + ... + 2282110.

Almost surely, 2^{2117578403452} is an apocalyptic number.

It is an amenable number.

2117578403452 is a deficient number, since it is larger than the sum of its proper divisors (1588207815564).

2117578403452 is a wasteful number, since it uses less digits than its factorization.

2117578403452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3430428 (or 3430426 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 49.

The spelling of 2117578403452 in words is "two trillion, one hundred seventeen billion, five hundred seventy-eight million, four hundred three thousand, four hundred fifty-two".