1797978244995 has 24 divisors (see below), whose sum is σ = 3116527277136. Its totient is φ = 958911991488.

The previous prime is 1797978244967. The next prime is 1797978245047. The reversal of 1797978244995 is 5994428797971.

1797978244995 is a `hidden beast` number, since 1 + 7 + 9 + 7 + 9 + 7 + 82 + 449 + 95 = 666.

It is not a de Polignac number, because 1797978244995 - 2¹² = 1797978240899 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7444149 + ... + 7681881.

It is an arithmetic number, because the mean of its divisors is an integer number (129855303214).

Almost surely, 2^{1797978244995} is an apocalyptic number.

1797978244995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1797978244995 is a deficient number, since it is larger than the sum of its proper divisors (1318549032141).

1797978244995 is a wasteful number, since it uses less digits than its factorization.

1797978244995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405811 (or 405808 counting only the distinct ones).

The product of its digits is 2880541440, while the sum is 81.

The spelling of 1797978244995 in words is "one trillion, seven hundred ninety-seven billion, nine hundred seventy-eight million, two hundred forty-four thousand, nine hundred ninety-five".