406722778372 has 48 divisors (see below), whose sum is σ = 755031458160. Its totient is φ = 191044288512.

The previous prime is 406722778369. The next prime is 406722778373. The reversal of 406722778372 is 273877227604.

It can be written as a sum of positive squares in 8 ways, for example, as 10107487296 + 396615291076 = 100536^2 + 629774^2 .

It is not an unprimeable number, because it can be changed into a prime (406722778373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110012428 + ... + 110016124.

It is an arithmetic number, because the mean of its divisors is an integer number (15729822045).

Almost surely, 2^406722778372 is an apocalyptic number.

It is an amenable number.

406722778372 is a deficient number, since it is larger than the sum of its proper divisors (348308679788).

406722778372 is a wasteful number, since it uses less digits than its factorization.

406722778372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6280 (or 6278 counting only the distinct ones).

The product of its (nonzero) digits is 11063808, while the sum is 55.

The spelling of 406722778372 in words is "four hundred six billion, seven hundred twenty-two million, seven hundred seventy-eight thousand, three hundred seventy-two".