1552776945 has 16 divisors (see below), whose sum is σ = 2493685440. Its totient is φ = 825066944.

The previous prime is 1552776937. The next prime is 1552776977. The reversal of 1552776945 is 5496772551.

It is a cyclic number.

It is not a de Polignac number, because 1552776945 - 2³ = 1552776937 is a prime.

It is a super-2 number, since 2×1552776945² = 4822232481847066050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188379 + ... + 196448.

It is an arithmetic number, because the mean of its divisors is an integer number (155855340).

Almost surely, 2^1552776945 is an apocalyptic number.

1552776945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1552776945 is a deficient number, since it is larger than the sum of its proper divisors (940908495).

1552776945 is a wasteful number, since it uses less digits than its factorization.

1552776945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385104.

The product of its digits is 2646000, while the sum is 51.

The square root of 1552776945 is about 39405.2908249641. The cubic root of 1552776945 is about 1157.9852425179.

The spelling of 1552776945 in words is "one billion, five hundred fifty-two million, seven hundred seventy-six thousand, nine hundred forty-five".