75704101981 has 4 divisors (see below), whose sum is σ = 75767560092. Its totient is φ = 75640643872.

The previous prime is 75704101927. The next prime is 75704101987. The reversal of 75704101981 is 18910140757.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56105501956 + 19598600025 = 236866^2 + 139995^2 .

It is a cyclic number.

It is not a de Polignac number, because 75704101981 - 2⁷ = 75704101853 is a prime.

It is a super-2 number, since 2×75704101981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75704101987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31727266 + ... + 31729651.

It is an arithmetic number, because the mean of its divisors is an integer number (18941890023).

Almost surely, 2^75704101981 is an apocalyptic number.

It is an amenable number.

75704101981 is a deficient number, since it is larger than the sum of its proper divisors (63458111).

75704101981 is a wasteful number, since it uses less digits than its factorization.

75704101981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63458110.

The product of its (nonzero) digits is 70560, while the sum is 43.

The spelling of 75704101981 in words is "seventy-five billion, seven hundred four million, one hundred one thousand, nine hundred eighty-one".