1603981455 has 16 divisors (see below), whose sum is σ = 2620975104. Its totient is φ = 837255200.

The previous prime is 1603981441. The next prime is 1603981469. The reversal of 1603981455 is 5541893061.

It is an interprime number because it is at equal distance from previous prime (1603981441) and next prime (1603981469).

It is not a de Polignac number, because 1603981455 - 2⁹ = 1603980943 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1136871 + ... + 1138280.

It is an arithmetic number, because the mean of its divisors is an integer number (163810944).

Almost surely, 2^1603981455 is an apocalyptic number.

1603981455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1603981455 is a deficient number, since it is larger than the sum of its proper divisors (1016993649).

1603981455 is a wasteful number, since it uses less digits than its factorization.

1603981455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275206.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 1603981455 is about 40049.7372650558. The cubic root of 1603981455 is about 1170.5764454362.

The spelling of 1603981455 in words is "one billion, six hundred three million, nine hundred eighty-one thousand, four hundred fifty-five".