1630855401 has 32 divisors (see below), whose sum is σ = 2614579968. Its totient is φ = 884597760.

The previous prime is 1630855399. The next prime is 1630855427. The reversal of 1630855401 is 1045580361.

It is not a de Polignac number, because 1630855401 - 2¹ = 1630855399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1630855451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6261 + ... + 57453.

It is an arithmetic number, because the mean of its divisors is an integer number (81705624).

Almost surely, 2^1630855401 is an apocalyptic number.

It is an amenable number.

1630855401 is a deficient number, since it is larger than the sum of its proper divisors (983724567).

1630855401 is a wasteful number, since it uses less digits than its factorization.

1630855401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51281.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 1630855401 is about 40383.8507450689. The cubic root of 1630855401 is about 1177.0777544906.

The spelling of 1630855401 in words is "one billion, six hundred thirty million, eight hundred fifty-five thousand, four hundred one".