1649306857147 has 4 divisors (see below), whose sum is σ = 1721015850960. Its totient is φ = 1577597863336.

The previous prime is 1649306857117. The next prime is 1649306857151. The reversal of 1649306857147 is 7417586039461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1649306857147 - 2¹¹ = 1649306855099 is a prime.

It is a super-2 number, since 2×1649306857147² (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 (1649306857117) 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, 35854496872 + ... + 35854496917.

It is an arithmetic number, because the mean of its divisors is an integer number (430253962740).

Almost surely, 2^{1649306857147} is an apocalyptic number.

1649306857147 is a deficient number, since it is larger than the sum of its proper divisors (71708993813).

1649306857147 is an equidigital number, since it uses as much as digits as its factorization.

1649306857147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71708993812.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 1649306857147 in words is "one trillion, six hundred forty-nine billion, three hundred six million, eight hundred fifty-seven thousand, one hundred forty-seven".