83153464640 has 28 divisors (see below), whose sum is σ = 198009188436. Its totient is φ = 33261385728.

The previous prime is 83153464633. The next prime is 83153464703. The reversal of 83153464640 is 4646435138.

It can be written as a sum of positive squares in 2 ways, for example, as 61052479744 + 22100984896 = 247088^2 + 148664^2 .

It is a junction number, because it is equal to n+sod(n) for n = 83153464591 and 83153464600.

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, 129926969 + ... + 129927608.

Almost surely, 2^83153464640 is an apocalyptic number.

83153464640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83153464640 is an abundant number, since it is smaller than the sum of its proper divisors (114855723796).

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

83153464640 is a wasteful number, since it uses less digits than its factorization.

83153464640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259854594 (or 259854584 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 44.

Adding to 83153464640 its reverse (4646435138), we get a palindrome (87799899778).

The spelling of 83153464640 in words is "eighty-three billion, one hundred fifty-three million, four hundred sixty-four thousand, six hundred forty".