51641658 has 32 divisors (see below), whose sum is σ = 120801600. Its totient is φ = 16307568.

The previous prime is 51641633. The next prime is 51641659. The reversal of 51641658 is 85614615.

51641658 is a `hidden beast` number, since 5 + 1 + 641 + 6 + 5 + 8 = 666.

It is a super-3 number, since 3×51641658³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51641659) 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, 24141 + ... + 26192.

It is an arithmetic number, because the mean of its divisors is an integer number (3775050).

Almost surely, 2^51641658 is an apocalyptic number.

51641658 is an abundant number, since it is smaller than the sum of its proper divisors (69159942).

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

51641658 is a wasteful number, since it uses less digits than its factorization.

51641658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50363 (or 50357 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 51641658 is about 7186.2130500007. The cubic root of 51641658 is about 372.3917569071.

The spelling of 51641658 in words is "fifty-one million, six hundred forty-one thousand, six hundred fifty-eight".