75787049772 has 144 divisors (see below), whose sum is σ = 225581242432. Its totient is φ = 21006397440.

The previous prime is 75787049761. The next prime is 75787049773. The reversal of 75787049772 is 27794078757.

75787049772 is a `hidden beast` number, since 7 + 5 + 7 + 8 + 70 + 497 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (75787049773) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1088388 + ... + 1155924.

Almost surely, 2^75787049772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75787049772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112790621216).

75787049772 is an abundant number, since it is smaller than the sum of its proper divisors (149794192660).

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

75787049772 is a wasteful number, since it uses less digits than its factorization.

75787049772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67688 (or 67683 counting only the distinct ones).

The product of its (nonzero) digits is 48404160, while the sum is 63.

The spelling of 75787049772 in words is "seventy-five billion, seven hundred eighty-seven million, forty-nine thousand, seven hundred seventy-two".