78152052204644 has 144 divisors (see below), whose sum is σ = 153481912879680. Its totient is φ = 34783694668800.

The previous prime is 78152052204593. The next prime is 78152052204647. The reversal of 78152052204644 is 44640225025187.

It is a super-2 number, since 2×78152052204644² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78152052204592 and 78152052204601.

It is not an unprimeable number, because it can be changed into a prime (78152052204647) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20137089584 + ... + 20137093464.

It is an arithmetic number, because the mean of its divisors is an integer number (1065846617220).

Almost surely, 2^{78152052204644} is an apocalyptic number.

It is an amenable number.

78152052204644 is a deficient number, since it is larger than the sum of its proper divisors (75329860675036).

78152052204644 is a wasteful number, since it uses less digits than its factorization.

78152052204644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6570 (or 6557 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 50.

The spelling of 78152052204644 in words is "seventy-eight trillion, one hundred fifty-two billion, fifty-two million, two hundred four thousand, six hundred forty-four".