1405566740356 has 27 divisors (see below), whose sum is σ = 2468465725509. Its totient is φ = 700299609408.

The previous prime is 1405566740353. The next prime is 1405566740377. The reversal of 1405566740356 is 6530476655041.

The square root of 1405566740356 is 1185566.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 379024922500 + 1026541817856 = 615650^2 + 1013184^2 .

It is a super-2 number, since 2×1405566740356² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1405566740353) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 799070605 + ... + 799072363.

Almost surely, 2^{1405566740356} is an apocalyptic number.

1405566740356 is the 1185566-th square number.

It is an amenable number.

1405566740356 is a deficient number, since it is larger than the sum of its proper divisors (1062898985153).

1405566740356 is an frugal number, since it uses more digits than its factorization.

1405566740356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4196 (or 2098 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 52.

The spelling of 1405566740356 in words is "one trillion, four hundred five billion, five hundred sixty-six million, seven hundred forty thousand, three hundred fifty-six".