1842720537551 has 2 divisors, whose sum is σ = 1842720537552. Its totient is φ = 1842720537550.

The previous prime is 1842720537523. The next prime is 1842720537557. The reversal of 1842720537551 is 1557350272481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1842720537551 - 2³⁰ = 1841646795727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1842720537551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1842720537557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 921360268775 + 921360268776.

It is an arithmetic number, because the mean of its divisors is an integer number (921360268776).

Almost surely, 2^{1842720537551} is an apocalyptic number.

1842720537551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1842720537551 is an equidigital number, since it uses as much as digits as its factorization.

1842720537551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352000, while the sum is 50.

The spelling of 1842720537551 in words is "one trillion, eight hundred forty-two billion, seven hundred twenty million, five hundred thirty-seven thousand, five hundred fifty-one".