1355657503 has 4 divisors (see below), whose sum is σ = 1435402080. Its totient is φ = 1275912928.

The previous prime is 1355657491. The next prime is 1355657507. The reversal of 1355657503 is 3057565531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1355657503 - 2²⁵ = 1322103071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355657507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39872263 + ... + 39872296.

It is an arithmetic number, because the mean of its divisors is an integer number (358850520).

Almost surely, 2^1355657503 is an apocalyptic number.

1355657503 is a deficient number, since it is larger than the sum of its proper divisors (79744577).

1355657503 is an equidigital number, since it uses as much as digits as its factorization.

1355657503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79744576.

The product of its (nonzero) digits is 236250, while the sum is 40.

The square root of 1355657503 is about 36819.2545144521. The cubic root of 1355657503 is about 1106.7511808350.

The spelling of 1355657503 in words is "one billion, three hundred fifty-five million, six hundred fifty-seven thousand, five hundred three".