6381542772 has 48 divisors (see below), whose sum is σ = 18048811200. Its totient is φ = 1933800480.

The previous prime is 6381542737. The next prime is 6381542779. The reversal of 6381542772 is 2772451836.

6381542772 is a `hidden beast` number, since 6 + 38 + 1 + 542 + 7 + 72 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6381542779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2684647 + ... + 2687022.

It is an arithmetic number, because the mean of its divisors is an integer number (376016900).

Almost surely, 2^6381542772 is an apocalyptic number.

It is an amenable number.

6381542772 is an abundant number, since it is smaller than the sum of its proper divisors (11667268428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6381542772 is a wasteful number, since it uses less digits than its factorization.

6381542772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5371693 (or 5371685 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 6381542772 is about 79884.5590336455. The cubic root of 6381542772 is about 1854.8490052746.

It can be divided in two parts, 63 and 81542772, that added together give a triangular number (81542835 = T₁₂₇₇₀).

The spelling of 6381542772 in words is "six billion, three hundred eighty-one million, five hundred forty-two thousand, seven hundred seventy-two".