64687029091 has 2 divisors, whose sum is σ = 64687029092. Its totient is φ = 64687029090.

The previous prime is 64687029073. The next prime is 64687029109. The reversal of 64687029091 is 19092078646.

It is a happy number.

Together with next prime (64687029109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (64687029073) and next prime (64687029109).

It is a cyclic number.

It is not a de Polignac number, because 64687029091 - 2¹¹ = 64687027043 is a prime.

It is not a weakly prime, because it can be changed into another prime (64687029031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32343514545 + 32343514546.

It is an arithmetic number, because the mean of its divisors is an integer number (32343514546).

Almost surely, 2^64687029091 is an apocalyptic number.

64687029091 is a deficient number, since it is larger than the sum of its proper divisors (1).

64687029091 is an equidigital number, since it uses as much as digits as its factorization.

64687029091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 64687029091 in words is "sixty-four billion, six hundred eighty-seven million, twenty-nine thousand, ninety-one".