641290377 has 64 divisors (see below), whose sum is σ = 1083375104. Its totient is φ = 328458240.

The previous prime is 641290339. The next prime is 641290379. The reversal of 641290377 is 773092146.

It is not a de Polignac number, because 641290377 - 2¹⁶ = 641224841 is a prime.

It is a super-2 number, since 2×641290377² = 822506695265604258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (641290379) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1615143 + ... + 1615539.

It is an arithmetic number, because the mean of its divisors is an integer number (16927736).

Almost surely, 2^641290377 is an apocalyptic number.

It is an amenable number.

641290377 is a deficient number, since it is larger than the sum of its proper divisors (442084727).

641290377 is a wasteful number, since it uses less digits than its factorization.

641290377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 641290377 is about 25323.7117540064. The cubic root of 641290377 is about 862.3526607381.

The spelling of 641290377 in words is "six hundred forty-one million, two hundred ninety thousand, three hundred seventy-seven".