75645101988 has 54 divisors (see below), whose sum is σ = 198558373286. Its totient is φ = 25215025248.

The previous prime is 75645101969. The next prime is 75645101989. The reversal of 75645101988 is 88910154657.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 65847665664 + 9797436324 = 256608^2 + 98982^2 .

It is a tau number, because it is divible by the number of its divisors (54).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (75645101989) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1414945 + ... + 1467432.

Almost surely, 2^75645101988 is an apocalyptic number.

It is an amenable number.

75645101988 is an abundant number, since it is smaller than the sum of its proper divisors (122913271298).

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

75645101988 is an equidigital number, since it uses as much as digits as its factorization.

75645101988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882405 (or 2882382 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 75645101988 in words is "seventy-five billion, six hundred forty-five million, one hundred one thousand, nine hundred eighty-eight".