764476012577421 has 6 divisors (see below), whose sum is σ = 1104243129278510. Its totient is φ = 509650675051608.

The previous prime is 764476012577419. The next prime is 764476012577513. The reversal of 764476012577421 is 124775210674467.

764476012577421 is a `hidden beast` number, since 7 + 6 + 4 + 4 + 7 + 6 + 0 + 12 + 577 + 42 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 496558205019396 + 267917807558025 = 22283586^2 + 16368195^2 .

It is not a de Polignac number, because 764476012577421 - 2¹ = 764476012577419 is a prime.

It is a super-3 number, since 3×764476012577421³ (a number of 46 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764476012570421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42470889587626 + ... + 42470889587643.

Almost surely, 2^{764476012577421} is an apocalyptic number.

It is an amenable number.

764476012577421 is a deficient number, since it is larger than the sum of its proper divisors (339767116701089).

764476012577421 is a wasteful number, since it uses less digits than its factorization.

764476012577421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84941779175275 (or 84941779175272 counting only the distinct ones).

The product of its (nonzero) digits is 110638080, while the sum is 63.

The spelling of 764476012577421 in words is "seven hundred sixty-four trillion, four hundred seventy-six billion, twelve million, five hundred seventy-seven thousand, four hundred twenty-one".