641401545 has 32 divisors (see below), whose sum is σ = 1058264064. Its totient is φ = 331531200.

The previous prime is 641401543. The next prime is 641401547. The reversal of 641401545 is 545104146.

It is an interprime number because it is at equal distance from previous prime (641401543) and next prime (641401547).

It is not a de Polignac number, because 641401545 - 2¹ = 641401543 is a prime.

It is a super-2 number, since 2×641401545² = 822791883856774050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (641401543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80700 + ... + 88290.

It is an arithmetic number, because the mean of its divisors is an integer number (33070752).

Almost surely, 2^641401545 is an apocalyptic number.

It is an amenable number.

641401545 is a deficient number, since it is larger than the sum of its proper divisors (416862519).

641401545 is a wasteful number, since it uses less digits than its factorization.

641401545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7773.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 641401545 is about 25325.9065977903. The cubic root of 641401545 is about 862.4024876106.

The spelling of 641401545 in words is "six hundred forty-one million, four hundred one thousand, five hundred forty-five".