3545720642 has 8 divisors (see below), whose sum is σ = 5333821500. Its totient is φ = 1767780144.

The previous prime is 3545720621. The next prime is 3545720683. The reversal of 3545720642 is 2460275453.

It can be written as a sum of positive squares in 2 ways, for example, as 3084802681 + 460917961 = 55541^2 + 21469^2 .

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

It is a super-2 number, since 2×3545720642² = 25144269742209784328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3545720596 and 3545720605.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2539217 + ... + 2540612.

Almost surely, 2^3545720642 is an apocalyptic number.

3545720642 is a deficient number, since it is larger than the sum of its proper divisors (1788100858).

3545720642 is a wasteful number, since it uses less digits than its factorization.

3545720642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5080180.

The product of its (nonzero) digits is 201600, while the sum is 38.

The square root of 3545720642 is about 59545.9540355178. The cubic root of 3545720642 is about 1524.8770865013.

The spelling of 3545720642 in words is "three billion, five hundred forty-five million, seven hundred twenty thousand, six hundred forty-two".