1355657540 has 12 divisors (see below), whose sum is σ = 2846880876. Its totient is φ = 542263008.

The previous prime is 1355657539. The next prime is 1355657549. The reversal of 1355657540 is 457565531.

1355657540 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 2 ways, for example, as 498807556 + 856849984 = 22334^2 + 29272^2 .

It is not an unprimeable number, because it can be changed into a prime (1355657549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33891419 + ... + 33891458.

It is an arithmetic number, because the mean of its divisors is an integer number (237240073).

Almost surely, 2^1355657540 is an apocalyptic number.

1355657540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1355657540 is an abundant number, since it is smaller than the sum of its proper divisors (1491223336).

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

1355657540 is a wasteful number, since it uses less digits than its factorization.

1355657540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67782886 (or 67782884 counting only the distinct ones).

The product of its (nonzero) digits is 315000, while the sum is 41.

The square root of 1355657540 is about 36819.2550169066. The cubic root of 1355657540 is about 1106.7511909038.

The spelling of 1355657540 in words is "one billion, three hundred fifty-five million, six hundred fifty-seven thousand, five hundred forty".