210450778672 has 20 divisors (see below), whose sum is σ = 407757573720. Its totient is φ = 105223017728.

The previous prime is 210450778663. The next prime is 210450778679. The reversal of 210450778672 is 276877054012.

It is a super-2 number, since 2×210450778672² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (210450778679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 748104 + ... + 990232.

It is an arithmetic number, because the mean of its divisors is an integer number (20387878686).

Almost surely, 2^210450778672 is an apocalyptic number.

It is an amenable number.

210450778672 is a deficient number, since it is larger than the sum of its proper divisors (197306795048).

210450778672 is a wasteful number, since it uses less digits than its factorization.

210450778672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296460 (or 296454 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 210450778672 in words is "two hundred ten billion, four hundred fifty million, seven hundred seventy-eight thousand, six hundred seventy-two".