1354781649 has 8 divisors (see below), whose sum is σ = 1945327552. Its totient is φ = 833711760.

The previous prime is 1354781639. The next prime is 1354781651. The reversal of 1354781649 is 9461874531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1354781649 - 2¹² = 1354777553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1354781598 and 1354781607.

It is not an unprimeable number, because it can be changed into a prime (1354781639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17368957 + ... + 17369034.

It is an arithmetic number, because the mean of its divisors is an integer number (243165944).

Almost surely, 2^1354781649 is an apocalyptic number.

It is an amenable number.

1354781649 is a deficient number, since it is larger than the sum of its proper divisors (590545903).

1354781649 is a wasteful number, since it uses less digits than its factorization.

1354781649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34738007.

The product of its digits is 725760, while the sum is 48.

The square root of 1354781649 is about 36807.3586256879. The cubic root of 1354781649 is about 1106.5127820557.

The spelling of 1354781649 in words is "one billion, three hundred fifty-four million, seven hundred eighty-one thousand, six hundred forty-nine".