5401642686 has 64 divisors (see below), whose sum is σ = 11949590016. Its totient is φ = 1614182400.

The previous prime is 5401642657. The next prime is 5401642693. The reversal of 5401642686 is 6862461045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1989666 + ... + 1992378.

It is an arithmetic number, because the mean of its divisors is an integer number (186712344).

Almost surely, 2^5401642686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5401642686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5974795008).

5401642686 is an abundant number, since it is smaller than the sum of its proper divisors (6547947330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5401642686 is a wasteful number, since it uses less digits than its factorization.

5401642686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137.

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 5401642686 is about 73495.8684961270. The cubic root of 5401642686 is about 1754.5885227808.

The spelling of 5401642686 in words is "five billion, four hundred one million, six hundred forty-two thousand, six hundred eighty-six".