78233842537650 has 72 divisors (see below), whose sum is σ = 210190944968004. Its totient is φ = 20862091209600.

The previous prime is 78233842537649. The next prime is 78233842537651. The reversal of 78233842537650 is 5673524833287.

78233842537650 is a `hidden beast` number, since 7 + 8 + 2 + 3 + 3 + 8 + 42 + 537 + 6 + 50 = 666.

It is an interprime number because it is at equal distance from previous prime (78233842537649) and next prime (78233842537651).

It can be written as a sum of positive squares in 6 ways, for example, as 34693996605921 + 43539845931729 = 5890161^2 + 6598473^2 .

It is a super-2 number, since 2×78233842537650² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78233842537651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35449560 + ... + 37591740.

Almost surely, 2^{78233842537650} is an apocalyptic number.

78233842537650 is an abundant number, since it is smaller than the sum of its proper divisors (131957102430354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78233842537650 is a wasteful number, since it uses less digits than its factorization.

78233842537650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223356 (or 2223348 counting only the distinct ones).

The product of its (nonzero) digits is 203212800, while the sum is 63.

The spelling of 78233842537650 in words is "seventy-eight trillion, two hundred thirty-three billion, eight hundred forty-two million, five hundred thirty-seven thousand, six hundred fifty".