1897140726936 has 1280 divisors, whose sum is σ = 7278269644800. Its totient is φ = 447434025984.

The previous prime is 1897140726931. The next prime is 1897140726941. The reversal of 1897140726936 is 6396270417981.

It is an interprime number because it is at equal distance from previous prime (1897140726931) and next prime (1897140726941).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897140726931) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 2138827885 + ... + 2138828771.

It is an arithmetic number, because the mean of its divisors is an integer number (5686148160).

Almost surely, 2^{1897140726936} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1897140726936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3639134822400).

1897140726936 is an abundant number, since it is smaller than the sum of its proper divisors (5381128917864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1897140726936 is a wasteful number, since it uses less digits than its factorization.

1897140726936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050 (or 1037 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 63.

The spelling of 1897140726936 in words is "one trillion, eight hundred ninety-seven billion, one hundred forty million, seven hundred twenty-six thousand, nine hundred thirty-six".