39699412758009 has 135 divisors (see below), whose sum is σ = 61889708533653. Its totient is φ = 25464947857272.

The previous prime is 39699412757987. The next prime is 39699412758043. The reversal of 39699412758009 is 90085721499693.

The square root of 39699412758009 is 6300747.

It is a perfect power (a square), and thus also a powerful number.

39699412758009 is a `hidden beast` number, since 3 + 9 + 69 + 9 + 412 + 75 + 80 + 0 + 9 = 666.

It is not a de Polignac number, because 39699412758009 - 2²¹ = 39699410660857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39699412756009) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 592528548594 + ... + 592528548660.

It is a 1-persistent number, because it is pandigital, but 2⋅39699412758009 = 79398825516018 is not.

Almost surely, 2^{39699412758009} is an apocalyptic number.

39699412758009 is the 6300747-th square number.

39699412758009 is the 3150374-th centered octagonal number.

It is an amenable number.

39699412758009 is a deficient number, since it is larger than the sum of its proper divisors (22190295775644).

39699412758009 is an frugal number, since it uses more digits than its factorization.

39699412758009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 264539520, while the sum is 72.

The spelling of 39699412758009 in words is "thirty-nine trillion, six hundred ninety-nine billion, four hundred twelve million, seven hundred fifty-eight thousand, nine".