1997262929877 has 64 divisors (see below), whose sum is σ = 2841310483200. Its totient is φ = 1245690593280.

The previous prime is 1997262929869. The next prime is 1997262929903. The reversal of 1997262929877 is 7789292627991.

It is not a de Polignac number, because 1997262929877 - 2³ = 1997262929869 is a prime.

It is a super-2 number, since 2×1997262929877² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997262929807) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 736181073 + ... + 736183785.

It is an arithmetic number, because the mean of its divisors is an integer number (44395476300).

Almost surely, 2^{1997262929877} is an apocalyptic number.

It is an amenable number.

1997262929877 is a deficient number, since it is larger than the sum of its proper divisors (844047553323).

1997262929877 is a wasteful number, since it uses less digits than its factorization.

1997262929877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118.

The product of its digits is 864162432, while the sum is 78.

The spelling of 1997262929877 in words is "one trillion, nine hundred ninety-seven billion, two hundred sixty-two million, nine hundred twenty-nine thousand, eight hundred seventy-seven".