1555040356 has 9 divisors (see below), whose sum is σ = 2721458649. Its totient is φ = 777480744.

The previous prime is 1555040341. The next prime is 1555040359. The reversal of 1555040356 is 6530405551.

The square root of 1555040356 is 39434.

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., 97022500 + 1458017856 = 9850^2 + 38184^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1555040359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 69010 + ... + 88726.

Almost surely, 2^1555040356 is an apocalyptic number.

1555040356 is the 39434-th square number.

It is an amenable number.

1555040356 is a deficient number, since it is larger than the sum of its proper divisors (1166418293).

1555040356 is an frugal number, since it uses more digits than its factorization.

1555040356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39438 (or 19719 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The cubic root of 1555040356 is about 1158.5476165006.

The spelling of 1555040356 in words is "one billion, five hundred fifty-five million, forty thousand, three hundred fifty-six".