72640061280351 has 8 divisors (see below), whose sum is σ = 107614905600560. Its totient is φ = 48426707520216.

The previous prime is 72640061280331. The next prime is 72640061280389. The reversal of 72640061280351 is 15308216004627.

72640061280351 is a `hidden beast` number, since 7 + 26 + 4 + 0 + 0 + 612 + 8 + 0 + 3 + 5 + 1 = 666.

It is not a de Polignac number, because 72640061280351 - 2⁶ = 72640061280287 is a prime.

It is a super-2 number, since 2×72640061280351² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72640061280297 and 72640061280306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72640061280331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1345186319980 + ... + 1345186320033.

It is an arithmetic number, because the mean of its divisors is an integer number (13451863200070).

Almost surely, 2^{72640061280351} is an apocalyptic number.

72640061280351 is a deficient number, since it is larger than the sum of its proper divisors (34974844320209).

72640061280351 is a wasteful number, since it uses less digits than its factorization.

72640061280351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690372640022 (or 2690372640016 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

Adding to 72640061280351 its reverse (15308216004627), we get a palindrome (87948277284978).

The spelling of 72640061280351 in words is "seventy-two trillion, six hundred forty billion, sixty-one million, two hundred eighty thousand, three hundred fifty-one".