64621408153 has 2 divisors, whose sum is σ = 64621408154. Its totient is φ = 64621408152.

The previous prime is 64621408129. The next prime is 64621408171. The reversal of 64621408153 is 35180412646.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60903823369 + 3717584784 = 246787^2 + 60972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64621408153 is a prime.

It is a super-2 number, since 2×64621408153² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64621498153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32310704076 + 32310704077.

It is an arithmetic number, because the mean of its divisors is an integer number (32310704077).

Almost surely, 2^64621408153 is an apocalyptic number.

It is an amenable number.

64621408153 is a deficient number, since it is larger than the sum of its proper divisors (1).

64621408153 is an equidigital number, since it uses as much as digits as its factorization.

64621408153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 64621408153 in words is "sixty-four billion, six hundred twenty-one million, four hundred eight thousand, one hundred fifty-three".