212638615672 has 32 divisors (see below), whose sum is σ = 479635977600. Its totient is φ = 86334475104.

The previous prime is 212638615621. The next prime is 212638615723. The reversal of 212638615672 is 276516836212.

It is an interprime number because it is at equal distance from previous prime (212638615621) and next prime (212638615723).

It is a super-3 number, since 3×212638615672³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99923098 + ... + 99925225.

It is an arithmetic number, because the mean of its divisors is an integer number (14988624300).

Almost surely, 2^212638615672 is an apocalyptic number.

It is an amenable number.

212638615672 is an abundant number, since it is smaller than the sum of its proper divisors (266997361928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212638615672 is a wasteful number, since it uses less digits than its factorization.

212638615672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199848355 (or 199848351 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The spelling of 212638615672 in words is "two hundred twelve billion, six hundred thirty-eight million, six hundred fifteen thousand, six hundred seventy-two".