201557751602 has 16 divisors (see below), whose sum is σ = 314960032800. Its totient is φ = 96654396960.

The previous prime is 201557751583. The next prime is 201557751631. The reversal of 201557751602 is 206157755102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 201557751602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20825852 + ... + 20835527.

It is an arithmetic number, because the mean of its divisors is an integer number (19685002050).

Almost surely, 2^201557751602 is an apocalyptic number.

201557751602 is a deficient number, since it is larger than the sum of its proper divisors (113402281198).

201557751602 is a wasteful number, since it uses less digits than its factorization.

201557751602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41661481.

The product of its (nonzero) digits is 147000, while the sum is 41.

The spelling of 201557751602 in words is "two hundred one billion, five hundred fifty-seven million, seven hundred fifty-one thousand, six hundred two".