64961265587 has 2 divisors, whose sum is σ = 64961265588. Its totient is φ = 64961265586.

The previous prime is 64961265583. The next prime is 64961265653. The reversal of 64961265587 is 78556216946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64961265587 - 2² = 64961265583 is a prime.

It is not a weakly prime, because it can be changed into another prime (64961265581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32480632793 + 32480632794.

It is an arithmetic number, because the mean of its divisors is an integer number (32480632794).

Almost surely, 2^64961265587 is an apocalyptic number.

64961265587 is a deficient number, since it is larger than the sum of its proper divisors (1).

64961265587 is an equidigital number, since it uses as much as digits as its factorization.

64961265587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21772800, while the sum is 59.

The spelling of 64961265587 in words is "sixty-four billion, nine hundred sixty-one million, two hundred sixty-five thousand, five hundred eighty-seven".