641514278 has 16 divisors (see below), whose sum is σ = 1054010880. Its totient is φ = 291478656.

The previous prime is 641514277. The next prime is 641514281. The reversal of 641514278 is 872415146.

It is a super-2 number, since 2×641514278² = 823081137755722568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641514277) 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, 324326 + ... + 326297.

It is an arithmetic number, because the mean of its divisors is an integer number (65875680).

Almost surely, 2^641514278 is an apocalyptic number.

641514278 is a deficient number, since it is larger than the sum of its proper divisors (412496602).

641514278 is a wasteful number, since it uses less digits than its factorization.

641514278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650671.

The product of its digits is 53760, while the sum is 38.

The square root of 641514278 is about 25328.1321458966. The cubic root of 641514278 is about 862.4530100564.

The spelling of 641514278 in words is "six hundred forty-one million, five hundred fourteen thousand, two hundred seventy-eight".