75145604821 has 32 divisors (see below), whose sum is σ = 88881811200. Its totient is φ = 62201018880.

The previous prime is 75145604819. The next prime is 75145604857. The reversal of 75145604821 is 12840654157.

It is not a de Polignac number, because 75145604821 - 2¹ = 75145604819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75145604881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27534585 + ... + 27537313.

It is an arithmetic number, because the mean of its divisors is an integer number (2777556600).

Almost surely, 2^75145604821 is an apocalyptic number.

It is an amenable number.

75145604821 is a deficient number, since it is larger than the sum of its proper divisors (13736206379).

75145604821 is a wasteful number, since it uses less digits than its factorization.

75145604821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949.

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 75145604821 in words is "seventy-five billion, one hundred forty-five million, six hundred four thousand, eight hundred twenty-one".