5551001645 has 32 divisors (see below), whose sum is σ = 7710163200. Its totient is φ = 3757856256.

The previous prime is 5551001633. The next prime is 5551001663. The reversal of 5551001645 is 5461001555.

It is not a de Polignac number, because 5551001645 - 2¹² = 5550997549 is a prime.

It is a super-3 number, since 3×5551001645³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3329102 + ... + 3330768.

It is an arithmetic number, because the mean of its divisors is an integer number (240942600).

Almost surely, 2^5551001645 is an apocalyptic number.

It is an amenable number.

5551001645 is a deficient number, since it is larger than the sum of its proper divisors (2159161555).

5551001645 is a wasteful number, since it uses less digits than its factorization.

5551001645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 5551001645 is about 74505.0444265353. The cubic root of 5551001645 is about 1770.6135578115.

The spelling of 5551001645 in words is "five billion, five hundred fifty-one million, one thousand, six hundred forty-five".