87638617342 has 4 divisors (see below), whose sum is σ = 131457926016. Its totient is φ = 43819308670.

The previous prime is 87638617321. The next prime is 87638617343. The reversal of 87638617342 is 24371683678.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87638617343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21909654334 + ... + 21909654337.

It is an arithmetic number, because the mean of its divisors is an integer number (32864481504).

Almost surely, 2^87638617342 is an apocalyptic number.

87638617342 is a deficient number, since it is larger than the sum of its proper divisors (43819308674).

87638617342 is a wasteful number, since it uses less digits than its factorization.

87638617342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43819308673.

The product of its digits is 8128512, while the sum is 55.

The spelling of 87638617342 in words is "eighty-seven billion, six hundred thirty-eight million, six hundred seventeen thousand, three hundred forty-two".