1897396051600 has 135 divisors (see below), whose sum is σ = 5303276940297. Its totient is φ = 650469671040.

The previous prime is 1897396051583. The next prime is 1897396051601. The reversal of 1897396051600 is 61506937981.

It is a happy number.

The square root of 1897396051600 is 1377460.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 683062578576 + 1214333473024 = 826476^2 + 1101968^2 .

It is a super-2 number, since 2×1897396051600² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1897396051601) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 192839481 + ... + 192849319.

Almost surely, 2^{1897396051600} is an apocalyptic number.

1897396051600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1897396051600 is the 1377460-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1897396051600

1897396051600 is an abundant number, since it is smaller than the sum of its proper divisors (3405880888697).

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

1897396051600 is an frugal number, since it uses more digits than its factorization.

1897396051600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19710 (or 9853 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 1897396051600 in words is "one trillion, eight hundred ninety-seven billion, three hundred ninety-six million, fifty-one thousand, six hundred".