1630261655 has 16 divisors (see below), whose sum is σ = 2246486400. Its totient is φ = 1123241760.

The previous prime is 1630261613. The next prime is 1630261687. The reversal of 1630261655 is 5561620361.

It is not a de Polignac number, because 1630261655 - 2¹⁶ = 1630196119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 778985 + ... + 781074.

It is an arithmetic number, because the mean of its divisors is an integer number (140405400).

Almost surely, 2^1630261655 is an apocalyptic number.

1630261655 is a deficient number, since it is larger than the sum of its proper divisors (616224745).

1630261655 is a wasteful number, since it uses less digits than its factorization.

1630261655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560094.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1630261655 is about 40376.4987957104. The cubic root of 1630261655 is about 1176.9348908049.

The spelling of 1630261655 in words is "one billion, six hundred thirty million, two hundred sixty-one thousand, six hundred fifty-five".