78412590002 has 4 divisors (see below), whose sum is σ = 117618885006. Its totient is φ = 39206295000.

The previous prime is 78412590001. The next prime is 78412590017. The reversal of 78412590002 is 20009521487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20009521487 = 43 ⋅465337709.

It can be written as a sum of positive squares in only one way, i.e., 68512539001 + 9900051001 = 261749^2 + 99499^2 .

It is a super-2 number, since 2×78412590002² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78412590001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19603147499 + ... + 19603147502.

Almost surely, 2^78412590002 is an apocalyptic number.

78412590002 is a deficient number, since it is larger than the sum of its proper divisors (39206295004).

78412590002 is a wasteful number, since it uses less digits than its factorization.

78412590002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39206295003.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 78412590002 in words is "seventy-eight billion, four hundred twelve million, five hundred ninety thousand, two".