1354431645 has 64 divisors (see below), whose sum is σ = 2760675840. Its totient is φ = 617186304.

The previous prime is 1354431641. The next prime is 1354431647. The reversal of 1354431645 is 5461344531.

1354431645 is a `hidden beast` number, since 1 + 3 + 5 + 4 + 4 + 3 + 1 + 645 = 666.

It is not a de Polignac number, because 1354431645 - 2² = 1354431641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1354431641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 316339 + ... + 320591.

It is an arithmetic number, because the mean of its divisors is an integer number (43135560).

Almost surely, 2^1354431645 is an apocalyptic number.

1354431645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1354431645 is an abundant number, since it is smaller than the sum of its proper divisors (1406244195).

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

1354431645 is a wasteful number, since it uses less digits than its factorization.

1354431645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4611 (or 4605 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 1354431645 is about 36802.6037801675. The cubic root of 1354431645 is about 1106.4174857015.

The spelling of 1354431645 in words is "one billion, three hundred fifty-four million, four hundred thirty-one thousand, six hundred forty-five".