252777501906 has 64 divisors (see below), whose sum is σ = 542262988800. Its totient is φ = 78270955776.

The previous prime is 252777501869. The next prime is 252777501913. The reversal of 252777501906 is 609105777252.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44823835 + ... + 44829473.

It is an arithmetic number, because the mean of its divisors is an integer number (8472859200).

Almost surely, 2^252777501906 is an apocalyptic number.

252777501906 is an abundant number, since it is smaller than the sum of its proper divisors (289485486894).

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

252777501906 is a wasteful number, since it uses less digits than its factorization.

252777501906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11303.

The product of its (nonzero) digits is 1852200, while the sum is 51.

The spelling of 252777501906 in words is "two hundred fifty-two billion, seven hundred seventy-seven million, five hundred one thousand, nine hundred six".