78322036551 has 16 divisors (see below), whose sum is σ = 118876135680. Its totient is φ = 45404078720.

The previous prime is 78322036537. The next prime is 78322036553. The reversal of 78322036551 is 15563022387.

It is a happy number.

It is not a de Polignac number, because 78322036551 - 2¹³ = 78322028359 is a prime.

It is a super-2 number, since 2×78322036551² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78322036553) 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, 51594786 + ... + 51596303.

It is an arithmetic number, because the mean of its divisors is an integer number (7429758480).

Almost surely, 2^78322036551 is an apocalyptic number.

78322036551 is a deficient number, since it is larger than the sum of its proper divisors (40554099129).

78322036551 is a wasteful number, since it uses less digits than its factorization.

78322036551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103191126.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 78322036551 in words is "seventy-eight billion, three hundred twenty-two million, thirty-six thousand, five hundred fifty-one".