7215251634644 has 12 divisors (see below), whose sum is σ = 12626712769524. Its totient is φ = 3607619414784.

The previous prime is 7215251634623. The next prime is 7215251634659. The reversal of 7215251634644 is 4464361525127.

It can be written as a sum of positive squares in 2 ways, for example, as 6896726850244 + 318524784400 = 2626162^2 + 564380^2 .

It is a super-2 number, since 2×7215251634644² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7215251634592 and 7215251634601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1683812 + ... + 4155204.

It is an arithmetic number, because the mean of its divisors is an integer number (1052226064127).

Almost surely, 2^{7215251634644} is an apocalyptic number.

It is an amenable number.

7215251634644 is a deficient number, since it is larger than the sum of its proper divisors (5411461134880).

7215251634644 is a wasteful number, since it uses less digits than its factorization.

7215251634644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201274 (or 3201272 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 50.

The spelling of 7215251634644 in words is "seven trillion, two hundred fifteen billion, two hundred fifty-one million, six hundred thirty-four thousand, six hundred forty-four".