64055243691 has 16 divisors (see below), whose sum is σ = 94969650720. Its totient is φ = 42670648800.

The previous prime is 64055243677. The next prime is 64055243729. The reversal of 64055243691 is 19634255046.

64055243691 is a `hidden beast` number, since 6 + 4 + 0 + 5 + 524 + 36 + 91 = 666.

It is not a de Polignac number, because 64055243691 - 2⁶ = 64055243627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64055243641) 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, 876640 + ... + 946893.

It is an arithmetic number, because the mean of its divisors is an integer number (5935603170).

Almost surely, 2^64055243691 is an apocalyptic number.

64055243691 is a deficient number, since it is larger than the sum of its proper divisors (30914407029).

64055243691 is a wasteful number, since it uses less digits than its factorization.

64055243691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824843 (or 1824837 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 64055243691 in words is "sixty-four billion, fifty-five million, two hundred forty-three thousand, six hundred ninety-one".