64137478684025 has 6 divisors (see below), whose sum is σ = 79530473568222. Its totient is φ = 51309982947200.

The previous prime is 64137478683991. The next prime is 64137478684057. The reversal of 64137478684025 is 52048687473146.

It can be written as a sum of positive squares in 3 ways, for example, as 6256666776889 + 57880811907136 = 2501333^2 + 7607944^2 .

It is not a de Polignac number, because 64137478684025 - 2⁶ = 64137478683961 is a prime.

It is a super-2 number, since 2×64137478684025² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1282749573656 + ... + 1282749573705.

It is an arithmetic number, because the mean of its divisors is an integer number (13255078928037).

Almost surely, 2^{64137478684025} is an apocalyptic number.

It is an amenable number.

64137478684025 is a deficient number, since it is larger than the sum of its proper divisors (15392994884197).

64137478684025 is a wasteful number, since it uses less digits than its factorization.

64137478684025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565499147371 (or 2565499147366 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 65.

The spelling of 64137478684025 in words is "sixty-four trillion, one hundred thirty-seven billion, four hundred seventy-eight million, six hundred eighty-four thousand, twenty-five".