761640215 has 16 divisors (see below), whose sum is σ = 1045135872. Its totient is φ = 521967264.

The previous prime is 761640203. The next prime is 761640233. The reversal of 761640215 is 512046167.

It is not a de Polignac number, because 761640215 - 2⁴ = 761640199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67832 + ... + 78258.

It is an arithmetic number, because the mean of its divisors is an integer number (65320992).

Almost surely, 2^761640215 is an apocalyptic number.

761640215 is a deficient number, since it is larger than the sum of its proper divisors (283495657).

761640215 is a wasteful number, since it uses less digits than its factorization.

761640215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12526.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 761640215 is about 27597.8298965698. The cubic root of 761640215 is about 913.2365589859.

The spelling of 761640215 in words is "seven hundred sixty-one million, six hundred forty thousand, two hundred fifteen".