75972664381 has 2 divisors, whose sum is σ = 75972664382. Its totient is φ = 75972664380.

The previous prime is 75972664351. The next prime is 75972664387. The reversal of 75972664381 is 18346627957.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69661156356 + 6311508025 = 263934^2 + 79445^2 .

It is a cyclic number.

It is not a de Polignac number, because 75972664381 - 2¹³ = 75972656189 is a prime.

It is a super-2 number, since 2×75972664381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75972664387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37986332190 + 37986332191.

It is an arithmetic number, because the mean of its divisors is an integer number (37986332191).

Almost surely, 2^75972664381 is an apocalyptic number.

It is an amenable number.

75972664381 is a deficient number, since it is larger than the sum of its proper divisors (1).

75972664381 is an equidigital number, since it uses as much as digits as its factorization.

75972664381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 58.

The spelling of 75972664381 in words is "seventy-five billion, nine hundred seventy-two million, six hundred sixty-four thousand, three hundred eighty-one".