1850897138551 has 2 divisors, whose sum is σ = 1850897138552. Its totient is φ = 1850897138550.

The previous prime is 1850897138479. The next prime is 1850897138557. The reversal of 1850897138551 is 1558317980581.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1850897138551 - 2⁷ = 1850897138423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1850897138551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1850897138557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925448569275 + 925448569276.

It is an arithmetic number, because the mean of its divisors is an integer number (925448569276).

Almost surely, 2^{1850897138551} is an apocalyptic number.

1850897138551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1850897138551 is an equidigital number, since it uses as much as digits as its factorization.

1850897138551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096000, while the sum is 61.

The spelling of 1850897138551 in words is "one trillion, eight hundred fifty billion, eight hundred ninety-seven million, one hundred thirty-eight thousand, five hundred fifty-one".