65451378 has 16 divisors (see below), whose sum is σ = 131389056. Its totient is φ = 21736080.

The previous prime is 65451367. The next prime is 65451383. The reversal of 65451378 is 87315456.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18501 + ... + 21752.

It is an arithmetic number, because the mean of its divisors is an integer number (8211816).

Almost surely, 2^65451378 is an apocalyptic number.

65451378 is an abundant number, since it is smaller than the sum of its proper divisors (65937678).

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

65451378 is a wasteful number, since it uses less digits than its factorization.

65451378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40529.

The product of its digits is 100800, while the sum is 39.

The square root of 65451378 is about 8090.2025932606. The cubic root of 65451378 is about 403.0011308865.

The spelling of 65451378 in words is "sixty-five million, four hundred fifty-one thousand, three hundred seventy-eight".