764120215 has 4 divisors (see below), whose sum is σ = 916944264. Its totient is φ = 611296168.

The previous prime is 764120183. The next prime is 764120281. The reversal of 764120215 is 512021467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 512021467 = 10477 ⋅48871.

It is a cyclic number.

It is not a de Polignac number, because 764120215 - 2⁵ = 764120183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76412017 + ... + 76412026.

It is an arithmetic number, because the mean of its divisors is an integer number (229236066).

Almost surely, 2^764120215 is an apocalyptic number.

764120215 is a deficient number, since it is larger than the sum of its proper divisors (152824049).

764120215 is a wasteful number, since it uses less digits than its factorization.

764120215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152824048.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 764120215 is about 27642.7244496631. The cubic root of 764120215 is about 914.2266909267.

The spelling of 764120215 in words is "seven hundred sixty-four million, one hundred twenty thousand, two hundred fifteen".