102072711178 has 4 divisors (see below), whose sum is σ = 153109066770. Its totient is φ = 51036355588.

The previous prime is 102072711173. The next prime is 102072711187. The reversal of 102072711178 is 871117270201.

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

It can be written as a sum of positive squares in only one way, i.e., 78616869769 + 23455841409 = 280387^2 + 153153^2 .

It is a super-2 number, since 2×102072711178² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102072711173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25518177793 + ... + 25518177796.

Almost surely, 2^102072711178 is an apocalyptic number.

102072711178 is a deficient number, since it is larger than the sum of its proper divisors (51036355592).

102072711178 is an equidigital number, since it uses as much as digits as its factorization.

102072711178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51036355591.

The product of its (nonzero) digits is 10976, while the sum is 37.

Adding to 102072711178 its reverse (871117270201), we get a palindrome (973189981379).

The spelling of 102072711178 in words is "one hundred two billion, seventy-two million, seven hundred eleven thousand, one hundred seventy-eight".