78202685136765 has 64 divisors (see below), whose sum is σ = 144062890500096. Its totient is φ = 35484858335232.

The previous prime is 78202685136761. The next prime is 78202685136799. The reversal of 78202685136765 is 56763158620287.

It is not a de Polignac number, because 78202685136765 - 2² = 78202685136761 is a prime.

It is a super-2 number, since 2×78202685136765² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78202685136696 and 78202685136705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78202685136761) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2516604 + ... + 12756906.

It is an arithmetic number, because the mean of its divisors is an integer number (2250982664064).

Almost surely, 2^{78202685136765} is an apocalyptic number.

It is an amenable number.

78202685136765 is a deficient number, since it is larger than the sum of its proper divisors (65860205363331).

78202685136765 is a wasteful number, since it uses less digits than its factorization.

78202685136765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10240858.

The product of its (nonzero) digits is 203212800, while the sum is 66.

The spelling of 78202685136765 in words is "seventy-eight trillion, two hundred two billion, six hundred eighty-five million, one hundred thirty-six thousand, seven hundred sixty-five".