1357735681 has 4 divisors (see below), whose sum is σ = 1359170352. Its totient is φ = 1356301012.

The previous prime is 1357735679. The next prime is 1357735711. The reversal of 1357735681 is 1865377531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1357735681 - 2¹ = 1357735679 is a prime.

It is a super-2 number, since 2×1357735681² = 3686892358921067522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1357735661) 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, 715915 + ... + 717808.

It is an arithmetic number, because the mean of its divisors is an integer number (339792588).

Almost surely, 2^1357735681 is an apocalyptic number.

It is an amenable number.

1357735681 is a deficient number, since it is larger than the sum of its proper divisors (1434671).

1357735681 is an equidigital number, since it uses as much as digits as its factorization.

1357735681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434670.

The product of its digits is 529200, while the sum is 46.

The square root of 1357735681 is about 36847.4650552789. The cubic root of 1357735681 is about 1107.3164297179.

The spelling of 1357735681 in words is "one billion, three hundred fifty-seven million, seven hundred thirty-five thousand, six hundred eighty-one".