201630517494 has 16 divisors (see below), whose sum is σ = 460869754368. Its totient is φ = 57608719272.

The previous prime is 201630517493. The next prime is 201630517523. The reversal of 201630517494 is 494715036102.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 4800726607 = 201630517494 / (2 + 0 + 1 + 6 + 3 + 0 + 5 + 1 + 7 + 4 + 9 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201630517493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2400363262 + ... + 2400363345.

It is an arithmetic number, because the mean of its divisors is an integer number (28804359648).

Almost surely, 2^201630517494 is an apocalyptic number.

201630517494 is an abundant number, since it is smaller than the sum of its proper divisors (259239236874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201630517494 is a wasteful number, since it uses less digits than its factorization.

201630517494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4800726619.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 201630517494 in words is "two hundred one billion, six hundred thirty million, five hundred seventeen thousand, four hundred ninety-four".