75161443749 has 64 divisors (see below), whose sum is σ = 123097024512. Its totient is φ = 39818188800.

The previous prime is 75161443741. The next prime is 75161443751. The reversal of 75161443749 is 94734416157.

It is not a de Polignac number, because 75161443749 - 2³ = 75161443741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75161443741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6401214 + ... + 6412944.

It is an arithmetic number, because the mean of its divisors is an integer number (1923391008).

Almost surely, 2^75161443749 is an apocalyptic number.

It is an amenable number.

75161443749 is a deficient number, since it is larger than the sum of its proper divisors (47935580763).

75161443749 is a wasteful number, since it uses less digits than its factorization.

75161443749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12026.

The product of its digits is 2540160, while the sum is 51.

The spelling of 75161443749 in words is "seventy-five billion, one hundred sixty-one million, four hundred forty-three thousand, seven hundred forty-nine".