64140254 has 4 divisors (see below), whose sum is σ = 96210384. Its totient is φ = 32070126.

The previous prime is 64140233. The next prime is 64140301. The reversal of 64140254 is 45204146.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×64140254² = 8227944366369032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16035062 + ... + 16035065.

It is an arithmetic number, because the mean of its divisors is an integer number (24052596).

Almost surely, 2^64140254 is an apocalyptic number.

64140254 is a deficient number, since it is larger than the sum of its proper divisors (32070130).

64140254 is a wasteful number, since it uses less digits than its factorization.

64140254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32070129.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 64140254 is about 8008.7610777198. The cubic root of 64140254 is about 400.2919826468.

The spelling of 64140254 in words is "sixty-four million, one hundred forty thousand, two hundred fifty-four".