1553745801 has 4 divisors (see below), whose sum is σ = 2071661072. Its totient is φ = 1035830532.

The previous prime is 1553745793. The next prime is 1553745857. The reversal of 1553745801 is 1085473551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1553745801 - 2³ = 1553745793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1553745801.

It is not an unprimeable number, because it can be changed into a prime (1553745871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258957631 + ... + 258957636.

It is an arithmetic number, because the mean of its divisors is an integer number (517915268).

Almost surely, 2^1553745801 is an apocalyptic number.

It is an amenable number.

1553745801 is a deficient number, since it is larger than the sum of its proper divisors (517915271).

1553745801 is an equidigital number, since it uses as much as digits as its factorization.

1553745801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517915270.

The product of its (nonzero) digits is 84000, while the sum is 39.

The square root of 1553745801 is about 39417.5823840073. The cubic root of 1553745801 is about 1158.2260342800.

The spelling of 1553745801 in words is "one billion, five hundred fifty-three million, seven hundred forty-five thousand, eight hundred one".