61820488128 has 56 divisors (see below), whose sum is σ = 186933384832. Its totient is φ = 17662996224.

The previous prime is 61820488127. The next prime is 61820488133. The reversal of 61820488128 is 82188402816.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61820488127) 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, 22997350 + ... + 23000037.

Almost surely, 2^61820488128 is an apocalyptic number.

It is an amenable number.

61820488128 is an abundant number, since it is smaller than the sum of its proper divisors (125112896704).

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

61820488128 is a wasteful number, since it uses less digits than its factorization.

61820488128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45997409 (or 45997399 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 48.

The spelling of 61820488128 in words is "sixty-one billion, eight hundred twenty million, four hundred eighty-eight thousand, one hundred twenty-eight".