64811209149952 has 40 divisors (see below), whose sum is σ = 129503424699000. Its totient is φ = 32403705022464.

The previous prime is 64811209149923. The next prime is 64811209149961. The reversal of 64811209149952 is 25994190211846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5053174 + ... + 12456202.

It is an arithmetic number, because the mean of its divisors is an integer number (3237585617475).

Almost surely, 2^{64811209149952} is an apocalyptic number.

It is an amenable number.

64811209149952 is a deficient number, since it is larger than the sum of its proper divisors (64692215549048).

64811209149952 is an equidigital number, since it uses as much as digits as its factorization.

64811209149952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7420146 (or 7420130 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 61.

The spelling of 64811209149952 in words is "sixty-four trillion, eight hundred eleven billion, two hundred nine million, one hundred forty-nine thousand, nine hundred fifty-two".