78105237653 has 16 divisors (see below), whose sum is σ = 83079406080. Its totient is φ = 73287902016.

The previous prime is 78105237641. The next prime is 78105237667. The reversal of 78105237653 is 35673250187.

It is a cyclic number.

It is not a de Polignac number, because 78105237653 - 2²⁰ = 78104189077 is a prime.

It is a super-2 number, since 2×78105237653² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78105237598 and 78105237607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78105237673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 883826 + ... + 968172.

It is an arithmetic number, because the mean of its divisors is an integer number (5192462880).

Almost surely, 2^78105237653 is an apocalyptic number.

It is an amenable number.

78105237653 is a deficient number, since it is larger than the sum of its proper divisors (4974168427).

78105237653 is a wasteful number, since it uses less digits than its factorization.

78105237653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85276.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 78105237653 in words is "seventy-eight billion, one hundred five million, two hundred thirty-seven thousand, six hundred fifty-three".