102138057458 has 8 divisors (see below), whose sum is σ = 153690390252. Its totient is φ = 50907927376.

The previous prime is 102138057431. The next prime is 102138057481. The reversal of 102138057458 is 854750831201.

It can be written as a sum of positive squares in 2 ways, for example, as 93625596289 + 8512461169 = 305983^2 + 92263^2 .

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

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, 80549885 + ... + 80551152.

Almost surely, 2^102138057458 is an apocalyptic number.

102138057458 is a deficient number, since it is larger than the sum of its proper divisors (51552332794).

102138057458 is a wasteful number, since it uses less digits than its factorization.

102138057458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161101356.

The product of its (nonzero) digits is 268800, while the sum is 44.

Adding to 102138057458 its reverse (854750831201), we get a palindrome (956888888659).

The spelling of 102138057458 in words is "one hundred two billion, one hundred thirty-eight million, fifty-seven thousand, four hundred fifty-eight".