75457630777721 has 8 divisors (see below), whose sum is σ = 79509235488000. Its totient is φ = 71414041113360.

The previous prime is 75457630777709. The next prime is 75457630777787. The reversal of 75457630777721 is 12777703675457.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75457630777721 - 2⁶ = 75457630777657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75457630777621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2003742146 + ... + 2003779803.

It is an arithmetic number, because the mean of its divisors is an integer number (9938654436000).

Almost surely, 2^{75457630777721} is an apocalyptic number.

It is an amenable number.

75457630777721 is a deficient number, since it is larger than the sum of its proper divisors (4051604710279).

75457630777721 is a wasteful number, since it uses less digits than its factorization.

75457630777721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007522959.

The product of its (nonzero) digits is 423536400, while the sum is 68.

The spelling of 75457630777721 in words is "seventy-five trillion, four hundred fifty-seven billion, six hundred thirty million, seven hundred seventy-seven thousand, seven hundred twenty-one".