64051961 has 2 divisors, whose sum is σ = 64051962. Its totient is φ = 64051960.

The previous prime is 64051951. The next prime is 64051973. The reversal of 64051961 is 16915046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41203561 + 22848400 = 6419^2 + 4780^2 .

It is a cyclic number.

It is not a de Polignac number, because 64051961 - 2¹⁴ = 64035577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64051901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32025980 + 32025981.

It is an arithmetic number, because the mean of its divisors is an integer number (32025981).

Almost surely, 2^64051961 is an apocalyptic number.

It is an amenable number.

64051961 is a deficient number, since it is larger than the sum of its proper divisors (1).

64051961 is an equidigital number, since it uses as much as digits as its factorization.

64051961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 64051961 is about 8003.2469036011. The cubic root of 64051961 is about 400.1082228003.

The spelling of 64051961 in words is "sixty-four million, fifty-one thousand, nine hundred sixty-one".