3615812537841 has 63 divisors (see below), whose sum is σ = 6306965914683. Its totient is φ = 2065973227920.

The previous prime is 3615812537819. The next prime is 3615812537929. The reversal of 3615812537841 is 1487352185163.

The square root of 3615812537841 is 1901529.

It is a perfect power (a square), and thus also a powerful number.

3615812537841 is a `hidden beast` number, since 3 + 6 + 1 + 58 + 12 + 537 + 8 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2069221833441 + 1546590704400 = 1438479^2 + 1243620^2 .

It is a tau number, because it is divible by the number of its divisors (63).

It is not a de Polignac number, because 3615812537841 - 2¹¹ = 3615812535793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3615812537801) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 359383951 + ... + 359394011.

Almost surely, 2^{3615812537841} is an apocalyptic number.

3615812537841 is the 1901529-th square number.

3615812537841 is the 950765-th centered octagonal number.

It is an amenable number.

3615812537841 is a deficient number, since it is larger than the sum of its proper divisors (2691153376842).

3615812537841 is an frugal number, since it uses more digits than its factorization.

3615812537841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20154 (or 10071 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The spelling of 3615812537841 in words is "three trillion, six hundred fifteen billion, eight hundred twelve million, five hundred thirty-seven thousand, eight hundred forty-one".