64017961449 has 16 divisors (see below), whose sum is σ = 91935591552. Its totient is φ = 39390369408.

The previous prime is 64017961373. The next prime is 64017961457. The reversal of 64017961449 is 94416971046.

It is not a de Polignac number, because 64017961449 - 2⁸ = 64017961193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64017961849) 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, 193869 + ... + 406965.

It is an arithmetic number, because the mean of its divisors is an integer number (5745974472).

Almost surely, 2^64017961449 is an apocalyptic number.

It is an amenable number.

64017961449 is a deficient number, since it is larger than the sum of its proper divisors (27917630103).

64017961449 is a wasteful number, since it uses less digits than its factorization.

64017961449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220816.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 64017961449 in words is "sixty-four billion, seventeen million, nine hundred sixty-one thousand, four hundred forty-nine".