1555428797 has 8 divisors (see below), whose sum is σ = 1747906944. Its totient is φ = 1373354928.

The previous prime is 1555428793. The next prime is 1555428827. The reversal of 1555428797 is 7978245551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1555428797 - 2² = 1555428793 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555428793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2600753 + ... + 2601350.

It is an arithmetic number, because the mean of its divisors is an integer number (218488368).

Almost surely, 2^1555428797 is an apocalyptic number.

It is an amenable number.

1555428797 is a deficient number, since it is larger than the sum of its proper divisors (192478147).

1555428797 is a wasteful number, since it uses less digits than its factorization.

1555428797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5202139.

The product of its digits is 3528000, while the sum is 53.

The square root of 1555428797 is about 39438.9248966044. The cubic root of 1555428797 is about 1158.6440748608.

The spelling of 1555428797 in words is "one billion, five hundred fifty-five million, four hundred twenty-eight thousand, seven hundred ninety-seven".