64140154 has 16 divisors (see below), whose sum is σ = 106139880. Its totient is φ = 28880640.

The previous prime is 64140149. The next prime is 64140157. The reversal of 64140154 is 45104146.

It can be written as a sum of positive squares in 4 ways, for example, as 47955625 + 16184529 = 6925^2 + 4023^2 .

It is a super-2 number, since 2×64140154² = 8227918710287432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64140157) 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, 29019 + ... + 31150.

Almost surely, 2^64140154 is an apocalyptic number.

64140154 is a deficient number, since it is larger than the sum of its proper divisors (41999726).

64140154 is a wasteful number, since it uses less digits than its factorization.

64140154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60225.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 64140154 is about 8008.7548345545. The cubic root of 64140154 is about 400.2917746172.

The spelling of 64140154 in words is "sixty-four million, one hundred forty thousand, one hundred fifty-four".