678621525481 has 8 divisors (see below), whose sum is σ = 700538471424. Its totient is φ = 656706200160.

The previous prime is 678621525479. The next prime is 678621525503. The reversal of 678621525481 is 184525126876.

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

It is a cyclic number.

It is not a de Polignac number, because 678621525481 - 2¹ = 678621525479 is a prime.

It is a super-2 number, since 2×678621525481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678621525181) 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, 476325 + ... + 1258621.

It is an arithmetic number, because the mean of its divisors is an integer number (87567308928).

Almost surely, 2^678621525481 is an apocalyptic number.

It is an amenable number.

678621525481 is a deficient number, since it is larger than the sum of its proper divisors (21916945943).

678621525481 is a wasteful number, since it uses less digits than its factorization.

678621525481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810311.

The product of its digits is 6451200, while the sum is 55.

The spelling of 678621525481 in words is "six hundred seventy-eight billion, six hundred twenty-one million, five hundred twenty-five thousand, four hundred eighty-one".