641061513 has 16 divisors (see below), whose sum is σ = 954700800. Its totient is φ = 425133360.

The previous prime is 641061461. The next prime is 641061541. The reversal of 641061513 is 315160146.

641061513 is a `hidden beast` number, since 6 + 41 + 0 + 615 + 1 + 3 = 666.

It is not a de Polignac number, because 641061513 - 2¹⁶ = 640995977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (641061563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56998 + ... + 67311.

It is an arithmetic number, because the mean of its divisors is an integer number (59668800).

Almost surely, 2^641061513 is an apocalyptic number.

It is an amenable number.

641061513 is a deficient number, since it is larger than the sum of its proper divisors (313639287).

641061513 is a wasteful number, since it uses less digits than its factorization.

641061513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124509 (or 124503 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 641061513 is about 25319.1925819130. The cubic root of 641061513 is about 862.2500629294.

The spelling of 641061513 in words is "six hundred forty-one million, sixty-one thousand, five hundred thirteen".