65542190 has 48 divisors (see below), whose sum is σ = 138446496. Its totient is φ = 21884160.

The previous prime is 65542189. The next prime is 65542193. The reversal of 65542190 is 9124556.

It is a happy number.

It is a super-2 number, since 2×65542190² = 8591557339992200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65542193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117392 + ... + 117948.

It is an arithmetic number, because the mean of its divisors is an integer number (2884302).

Almost surely, 2^65542190 is an apocalyptic number.

65542190 is an abundant number, since it is smaller than the sum of its proper divisors (72904306).

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

65542190 is a wasteful number, since it uses less digits than its factorization.

65542190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 65542190 is about 8095.8131154320. The cubic root of 65542190 is about 403.1874291073.

The spelling of 65542190 in words is "sixty-five million, five hundred forty-two thousand, one hundred ninety".