630851979801 has 16 divisors (see below), whose sum is σ = 886474395200. Its totient is φ = 397952180928.

The previous prime is 630851979799. The next prime is 630851979811. The reversal of 630851979801 is 108979158036.

It is not a de Polignac number, because 630851979801 - 2¹ = 630851979799 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (630851979811) 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, 6628006 + ... + 6722511.

It is an arithmetic number, because the mean of its divisors is an integer number (55404649700).

Almost surely, 2^630851979801 is an apocalyptic number.

It is an amenable number.

630851979801 is a deficient number, since it is larger than the sum of its proper divisors (255622415399).

630851979801 is a wasteful number, since it uses less digits than its factorization.

630851979801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13351368.

The product of its (nonzero) digits is 3265920, while the sum is 57.

The spelling of 630851979801 in words is "six hundred thirty billion, eight hundred fifty-one million, nine hundred seventy-nine thousand, eight hundred one".