78125000102 has 4 divisors (see below), whose sum is σ = 117187500156. Its totient is φ = 39062500050.

The previous prime is 78125000101. The next prime is 78125000117. The reversal of 78125000102 is 20100052187.

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

It is a super-2 number, since 2×78125000102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78125000101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19531250024 + ... + 19531250027.

It is an arithmetic number, because the mean of its divisors is an integer number (29296875039).

Almost surely, 2^78125000102 is an apocalyptic number.

78125000102 is a deficient number, since it is larger than the sum of its proper divisors (39062500054).

78125000102 is a wasteful number, since it uses less digits than its factorization.

78125000102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39062500053.

The product of its (nonzero) digits is 1120, while the sum is 26.

Adding to 78125000102 its reverse (20100052187), we get a palindrome (98225052289).

The spelling of 78125000102 in words is "seventy-eight billion, one hundred twenty-five million, one hundred two", and thus it is an aban number.