64942612421 has 8 divisors (see below), whose sum is σ = 66021147360. Its totient is φ = 63872810928.

The previous prime is 64942612403. The next prime is 64942612439. The reversal of 64942612421 is 12421624946.

It is an interprime number because it is at equal distance from previous prime (64942612403) and next prime (64942612439).

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

It is a cyclic number.

It is not a de Polignac number, because 64942612421 - 2²⁶ = 64875503557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64942612621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2168366 + ... + 2198111.

It is an arithmetic number, because the mean of its divisors is an integer number (8252643420).

Almost surely, 2^64942612421 is an apocalyptic number.

It is an amenable number.

64942612421 is a deficient number, since it is larger than the sum of its proper divisors (1078534939).

64942612421 is a wasteful number, since it uses less digits than its factorization.

64942612421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366723.

The product of its digits is 165888, while the sum is 41.

The spelling of 64942612421 in words is "sixty-four billion, nine hundred forty-two million, six hundred twelve thousand, four hundred twenty-one".