1630421451 has 6 divisors (see below), whose sum is σ = 2355053220. Its totient is φ = 1086947628.

The previous prime is 1630421449. The next prime is 1630421459. The reversal of 1630421451 is 1541240361.

It is a happy number.

1630421451 is a `hidden beast` number, since 1 + 630 + 4 + 21 + 4 + 5 + 1 = 666.

It is not a de Polignac number, because 1630421451 - 2¹ = 1630421449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1630421459) 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, 90578961 + ... + 90578978.

It is an arithmetic number, because the mean of its divisors is an integer number (392508870).

Almost surely, 2^1630421451 is an apocalyptic number.

1630421451 is a deficient number, since it is larger than the sum of its proper divisors (724631769).

1630421451 is a wasteful number, since it uses less digits than its factorization.

1630421451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181157945 (or 181157942 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1630421451 is about 40378.4775715975. The cubic root of 1630421451 is about 1176.9733433938.

The spelling of 1630421451 in words is "one billion, six hundred thirty million, four hundred twenty-one thousand, four hundred fifty-one".