1555474656 has 48 divisors (see below), whose sum is σ = 4139072784. Its totient is φ = 511386624.

The previous prime is 1555474633. The next prime is 1555474663. The reversal of 1555474656 is 6564745551.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103971 + ... + 117986.

It is an arithmetic number, because the mean of its divisors is an integer number (86230683).

Almost surely, 2^1555474656 is an apocalyptic number.

1555474656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1555474656 is an abundant number, since it is smaller than the sum of its proper divisors (2583598128).

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

1555474656 is a wasteful number, since it uses less digits than its factorization.

1555474656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222043 (or 222035 counting only the distinct ones).

The product of its digits is 2520000, while the sum is 48.

The square root of 1555474656 is about 39439.5062849423. The cubic root of 1555474656 is about 1158.6554615894.

The spelling of 1555474656 in words is "one billion, five hundred fifty-five million, four hundred seventy-four thousand, six hundred fifty-six".