42154221464 has 8 divisors (see below), whose sum is σ = 79039165260. Its totient is φ = 21077110728.

The previous prime is 42154221449. The next prime is 42154221469. The reversal of 42154221464 is 46412245124.

It is a happy number.

42154221464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42154221469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2634638834 + ... + 2634638849.

Almost surely, 2^42154221464 is an apocalyptic number.

It is an amenable number.

42154221464 is a deficient number, since it is larger than the sum of its proper divisors (36884943796).

42154221464 is a wasteful number, since it uses less digits than its factorization.

42154221464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5269277689 (or 5269277685 counting only the distinct ones).

The product of its digits is 61440, while the sum is 35.

Adding to 42154221464 its reverse (46412245124), we get a palindrome (88566466588).

The spelling of 42154221464 in words is "forty-two billion, one hundred fifty-four million, two hundred twenty-one thousand, four hundred sixty-four".