78336057551 has 8 divisors (see below), whose sum is σ = 79672118400. Its totient is φ = 77000274520.

The previous prime is 78336057539. The next prime is 78336057559. The reversal of 78336057551 is 15575063387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78336057551 is a prime.

It is a super-2 number, since 2×78336057551² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78336057551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78336057559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545270 + ... + 673788.

It is an arithmetic number, because the mean of its divisors is an integer number (9959014800).

Almost surely, 2^78336057551 is an apocalyptic number.

78336057551 is a deficient number, since it is larger than the sum of its proper divisors (1336060849).

78336057551 is a wasteful number, since it uses less digits than its factorization.

78336057551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138909.

The product of its (nonzero) digits is 2646000, while the sum is 50.

The spelling of 78336057551 in words is "seventy-eight billion, three hundred thirty-six million, fifty-seven thousand, five hundred fifty-one".