1551623056 has 20 divisors (see below), whose sum is σ = 3136977792. Its totient is φ = 742080416.

The previous prime is 1551623041. The next prime is 1551623057. The reversal of 1551623056 is 6503261551.

It is not an unprimeable number, because it can be changed into a prime (1551623057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2107816 + ... + 2108551.

Almost surely, 2^1551623056 is an apocalyptic number.

1551623056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1551623056 is an abundant number, since it is smaller than the sum of its proper divisors (1585354736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1551623056 is a wasteful number, since it uses less digits than its factorization.

1551623056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216398 (or 4216392 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 1551623056 is about 39390.6468086017. The cubic root of 1551623056 is about 1157.6983334089.

The spelling of 1551623056 in words is "one billion, five hundred fifty-one million, six hundred twenty-three thousand, fifty-six".