78628468953 has 4 divisors (see below), whose sum is σ = 104837958608. Its totient is φ = 52418979300.

The previous prime is 78628468951. The next prime is 78628469039. The reversal of 78628468953 is 35986482687.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 78628468953 - 2¹ = 78628468951 is a prime.

It is a super-2 number, since 2×78628468953² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78628468951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13104744823 + ... + 13104744828.

It is an arithmetic number, because the mean of its divisors is an integer number (26209489652).

Almost surely, 2^78628468953 is an apocalyptic number.

It is an amenable number.

78628468953 is a deficient number, since it is larger than the sum of its proper divisors (26209489655).

78628468953 is a wasteful number, since it uses less digits than its factorization.

78628468953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26209489654.

The product of its digits is 139345920, while the sum is 66.

It can be divided in two parts, 78628 and 468953, that added together give a triangular number (547581 = T₁₀₄₆).

The spelling of 78628468953 in words is "seventy-eight billion, six hundred twenty-eight million, four hundred sixty-eight thousand, nine hundred fifty-three".