78024426551 has 6 divisors (see below), whose sum is σ = 79024585752. Its totient is φ = 77036769420.

The previous prime is 78024426547. The next prime is 78024426559. The reversal of 78024426551 is 15562442087.

It is not a de Polignac number, because 78024426551 - 2² = 78024426547 is a prime.

It is a super-2 number, since 2×78024426551² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78024426559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6244715 + ... + 6257196.

It is an arithmetic number, because the mean of its divisors is an integer number (13170764292).

Almost surely, 2^78024426551 is an apocalyptic number.

78024426551 is a deficient number, since it is larger than the sum of its proper divisors (1000159201).

78024426551 is an equidigital number, since it uses as much as digits as its factorization.

78024426551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12502069 (or 12501990 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 78024426551 in words is "seventy-eight billion, twenty-four million, four hundred twenty-six thousand, five hundred fifty-one".