5461991645 has 8 divisors (see below), whose sum is σ = 7150243680. Its totient is φ = 3972357520.

The previous prime is 5461991641. The next prime is 5461991651.

5461991645 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 5461991645 - 2² = 5461991641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5461991593 and 5461991602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5461991641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49654415 + ... + 49654524.

It is an arithmetic number, because the mean of its divisors is an integer number (893780460).

Almost surely, 2^5461991645 is an apocalyptic number.

5461991645 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5461991645 is a deficient number, since it is larger than the sum of its proper divisors (1688252035).

5461991645 is a wasteful number, since it uses less digits than its factorization.

5461991645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99308955.

The product of its digits is 1166400, while the sum is 50.

The square root of 5461991645 is about 73905.2883425807. The cubic root of 5461991645 is about 1761.0986216076.

The spelling of 5461991645 in words is "five billion, four hundred sixty-one million, nine hundred ninety-one thousand, six hundred forty-five".