1199577720638 has 16 divisors (see below), whose sum is σ = 1963702471536. Its totient is φ = 545052291840.

The previous prime is 1199577720637. The next prime is 1199577720659. The reversal of 1199577720638 is 8360277759911.

It is a super-2 number, since 2×1199577720638² (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 (1199577720637) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10457081 + ... + 10571172.

It is an arithmetic number, because the mean of its divisors is an integer number (122731404471).

Almost surely, 2^{1199577720638} is an apocalyptic number.

1199577720638 is a deficient number, since it is larger than the sum of its proper divisors (764124750898).

1199577720638 is a wasteful number, since it uses less digits than its factorization.

1199577720638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21030859.

The product of its (nonzero) digits is 40007520, while the sum is 65.

The spelling of 1199577720638 in words is "one trillion, one hundred ninety-nine billion, five hundred seventy-seven million, seven hundred twenty thousand, six hundred thirty-eight".