6900531644 has 12 divisors (see below), whose sum is σ = 12711505800. Its totient is φ = 3268672848.

The previous prime is 6900531641. The next prime is 6900531661. The reversal of 6900531644 is 4461350096.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 6900531598 and 6900531607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6900531641) 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, 45398159 + ... + 45398310.

It is an arithmetic number, because the mean of its divisors is an integer number (1059292150).

Almost surely, 2^6900531644 is an apocalyptic number.

It is an amenable number.

6900531644 is a deficient number, since it is larger than the sum of its proper divisors (5810974156).

6900531644 is a wasteful number, since it uses less digits than its factorization.

6900531644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90796492 (or 90796490 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 6900531644 is about 83069.4386883648. The cubic root of 6900531644 is about 1903.8271559873.

The spelling of 6900531644 in words is "six billion, nine hundred million, five hundred thirty-one thousand, six hundred forty-four".