64306015381 has 2 divisors, whose sum is σ = 64306015382. Its totient is φ = 64306015380.

The previous prime is 64306015373. The next prime is 64306015387. The reversal of 64306015381 is 18351060346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63323192881 + 982822500 = 251641^2 + 31350^2 .

It is a cyclic number.

It is not a de Polignac number, because 64306015381 - 2³ = 64306015373 is a prime.

It is a super-2 number, since 2×64306015381² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64306015381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64306015387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32153007690 + 32153007691.

It is an arithmetic number, because the mean of its divisors is an integer number (32153007691).

Almost surely, 2^64306015381 is an apocalyptic number.

It is an amenable number.

64306015381 is a deficient number, since it is larger than the sum of its proper divisors (1).

64306015381 is an equidigital number, since it uses as much as digits as its factorization.

64306015381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 64306015381 in words is "sixty-four billion, three hundred six million, fifteen thousand, three hundred eighty-one".