1997391141753 has 32 divisors (see below), whose sum is σ = 3048814282752. Its totient is φ = 1139428857600.

The previous prime is 1997391141743. The next prime is 1997391141761. The reversal of 1997391141753 is 3571411937991.

It is a happy number.

It is not a de Polignac number, because 1997391141753 - 2¹³ = 1997391133561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1997391141743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33845850 + ... + 33904812.

It is an arithmetic number, because the mean of its divisors is an integer number (95275446336).

Almost surely, 2^{1997391141753} is an apocalyptic number.

It is an amenable number.

1997391141753 is a deficient number, since it is larger than the sum of its proper divisors (1051423140999).

1997391141753 is a wasteful number, since it uses less digits than its factorization.

1997391141753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61685.

The product of its digits is 6429780, while the sum is 60.

The spelling of 1997391141753 in words is "one trillion, nine hundred ninety-seven billion, three hundred ninety-one million, one hundred forty-one thousand, seven hundred fifty-three".