643077155425 has 24 divisors (see below), whose sum is σ = 868329244800. Its totient is φ = 470578409280.

The previous prime is 643077155359. The next prime is 643077155503. The reversal of 643077155425 is 524551770346.

It is not a de Polignac number, because 643077155425 - 2¹⁷ = 643077024353 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23328409 + ... + 23355958.

It is an arithmetic number, because the mean of its divisors is an integer number (36180385200).

Almost surely, 2^643077155425 is an apocalyptic number.

It is an amenable number.

643077155425 is a deficient number, since it is larger than the sum of its proper divisors (225252089375).

643077155425 is a wasteful number, since it uses less digits than its factorization.

643077155425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46684425 (or 46684420 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 49.

The spelling of 643077155425 in words is "six hundred forty-three billion, seventy-seven million, one hundred fifty-five thousand, four hundred twenty-five".