64815850620087 has 16 divisors (see below), whose sum is σ = 98786728538880. Its totient is φ = 37030234649472.

The previous prime is 64815850620029. The next prime is 64815850620091. The reversal of 64815850620087 is 78002605851846.

It is not a de Polignac number, because 64815850620087 - 2⁷ = 64815850619959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64815850620087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64815850620187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307987153 + ... + 308197530.

It is an arithmetic number, because the mean of its divisors is an integer number (6174170533680).

Almost surely, 2^{64815850620087} is an apocalyptic number.

64815850620087 is a deficient number, since it is larger than the sum of its proper divisors (33970877918793).

64815850620087 is a wasteful number, since it uses less digits than its factorization.

64815850620087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616189702.

The product of its (nonzero) digits is 25804800, while the sum is 60.

The spelling of 64815850620087 in words is "sixty-four trillion, eight hundred fifteen billion, eight hundred fifty million, six hundred twenty thousand, eighty-seven".