641240654 has 4 divisors (see below), whose sum is σ = 961860984. Its totient is φ = 320620326.

The previous prime is 641240651. The next prime is 641240657. The reversal of 641240654 is 456042146.

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

It is an interprime number because it is at equal distance from previous prime (641240651) and next prime (641240657).

It is a super-2 number, since 2×641240654² = 822379152684695432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641240654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641240651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160310162 + ... + 160310165.

It is an arithmetic number, because the mean of its divisors is an integer number (240465246).

Almost surely, 2^641240654 is an apocalyptic number.

641240654 is a deficient number, since it is larger than the sum of its proper divisors (320620330).

641240654 is a wasteful number, since it uses less digits than its factorization.

641240654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320620329.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 641240654 is about 25322.7299871084. The cubic root of 641240654 is about 862.3303724107.

The spelling of 641240654 in words is "six hundred forty-one million, two hundred forty thousand, six hundred fifty-four".