64400765422 has 8 divisors (see below), whose sum is σ = 110401312176. Its totient is φ = 27600328032.

The previous prime is 64400765369. The next prime is 64400765447. The reversal of 64400765422 is 22456700446.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 2300027323 + ... + 2300027350.

It is an arithmetic number, because the mean of its divisors is an integer number (13800164022).

Almost surely, 2^64400765422 is an apocalyptic number.

64400765422 is a deficient number, since it is larger than the sum of its proper divisors (46000546754).

64400765422 is a wasteful number, since it uses less digits than its factorization.

64400765422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600054682.

The product of its (nonzero) digits is 322560, while the sum is 40.

The spelling of 64400765422 in words is "sixty-four billion, four hundred million, seven hundred sixty-five thousand, four hundred twenty-two".