5121666630540 has 36 divisors (see below), whose sum is σ = 15535722113184. Its totient is φ = 1365777768096.

The previous prime is 5121666630463. The next prime is 5121666630547. The reversal of 5121666630540 is 450366661215.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (5121666630547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14226851572 + ... + 14226851931.

Almost surely, 2^{5121666630540} is an apocalyptic number.

It is an amenable number.

5121666630540 is an abundant number, since it is smaller than the sum of its proper divisors (10414055482644).

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

5121666630540 is a wasteful number, since it uses less digits than its factorization.

5121666630540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28453703518 (or 28453703513 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 5121666630540 in words is "five trillion, one hundred twenty-one billion, six hundred sixty-six million, six hundred thirty thousand, five hundred forty".