3651879389472 has 36 divisors (see below), whose sum is σ = 10385032014630. Its totient is φ = 1217293129728.

The previous prime is 3651879389461. The next prime is 3651879389507. The reversal of 3651879389472 is 2749839781563.

3651879389472 is a `hidden beast` number, since 3 + 6 + 5 + 1 + 8 + 79 + 3 + 89 + 472 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2076261973776 + 1575617415696 = 1440924^2 + 1255236^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 3651879389472.

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 5 ways as a sum of consecutive naturals, for example, 6340068097 + ... + 6340068672.

Almost surely, 2^{3651879389472} is an apocalyptic number.

3651879389472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3651879389472 is an abundant number, since it is smaller than the sum of its proper divisors (6733152625158).

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

3651879389472 is a wasteful number, since it uses less digits than its factorization.

3651879389472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12680136785 (or 12680136774 counting only the distinct ones).

The product of its digits is 548674560, while the sum is 72.

The spelling of 3651879389472 in words is "three trillion, six hundred fifty-one billion, eight hundred seventy-nine million, three hundred eighty-nine thousand, four hundred seventy-two".