1547215064641 has 9 divisors (see below), whose sum is σ = 1556130948771. Its totient is φ = 1538349996024.

The previous prime is 1547215064639. The next prime is 1547215064663. The reversal of 1547215064641 is 1464605127451.

It is a happy number.

The square root of 1547215064641 is 1243871.

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

It can be written as a sum of positive squares in only one way, i.e., 1353315749041 + 193899315600 = 1163321^2 + 440340^2 .

It is not a de Polignac number, because 1547215064641 - 2¹ = 1547215064639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1547215064591 and 1547215064600.

It is not an unprimeable number, because it can be changed into a prime (1547215064621) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 222649435 + ... + 222656383.

Almost surely, 2^{1547215064641} is an apocalyptic number.

1547215064641 is the 1243871-st square number.

1547215064641 is the 621936-th centered octagonal number.

It is an amenable number.

1547215064641 is a deficient number, since it is larger than the sum of its proper divisors (8915884130).

1547215064641 is an frugal number, since it uses more digits than its factorization.

1547215064641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14256 (or 7128 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 1547215064641 in words is "one trillion, five hundred forty-seven billion, two hundred fifteen million, sixty-four thousand, six hundred forty-one".