64421162036225 has 12 divisors (see below), whose sum is σ = 81389453019516. Its totient is φ = 50564534729280.

The previous prime is 64421162036197. The next prime is 64421162036251. The reversal of 64421162036225 is 52263026112446.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2763347678224 + 61657814358001 = 1662332^2 + 7852249^2 .

It is not a de Polignac number, because 64421162036225 - 2¹⁶ = 64421161970689 is a prime.

It is a super-2 number, since 2×64421162036225² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24309871142 + ... + 24309873791.

It is an arithmetic number, because the mean of its divisors is an integer number (6782454418293).

Almost surely, 2^{64421162036225} is an apocalyptic number.

It is an amenable number.

64421162036225 is a deficient number, since it is larger than the sum of its proper divisors (16968290983291).

64421162036225 is a wasteful number, since it uses less digits than its factorization.

64421162036225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48619744996 (or 48619744991 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 64421162036225 in words is "sixty-four trillion, four hundred twenty-one billion, one hundred sixty-two million, thirty-six thousand, two hundred twenty-five".