142621283638 has 4 divisors (see below), whose sum is σ = 213931925460. Its totient is φ = 71310641818.

The previous prime is 142621283561. The next prime is 142621283657. The reversal of 142621283638 is 836382126241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836382126241 = 17047 ⋅49063303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35655320908 + ... + 35655320911.

It is an arithmetic number, because the mean of its divisors is an integer number (53482981365).

Almost surely, 2^142621283638 is an apocalyptic number.

142621283638 is a deficient number, since it is larger than the sum of its proper divisors (71310641822).

142621283638 is an equidigital number, since it uses as much as digits as its factorization.

142621283638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71310641821.

The product of its digits is 663552, while the sum is 46.

The spelling of 142621283638 in words is "one hundred forty-two billion, six hundred twenty-one million, two hundred eighty-three thousand, six hundred thirty-eight".