355120640394 has 64 divisors (see below), whose sum is σ = 784087613568. Its totient is φ = 106527052800.

The previous prime is 355120640387. The next prime is 355120640473. The reversal of 355120640394 is 493046021553.

It is a super-2 number, since 2×355120640394² (a number of 24 digits) contains 22 as substring.

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, 4543989 + ... + 4621479.

It is an arithmetic number, because the mean of its divisors is an integer number (12251368962).

Almost surely, 2^355120640394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 355120640394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392043806784).

355120640394 is an abundant number, since it is smaller than the sum of its proper divisors (428966973174).

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

355120640394 is a wasteful number, since it uses less digits than its factorization.

355120640394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78983.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 355120640394 in words is "three hundred fifty-five billion, one hundred twenty million, six hundred forty thousand, three hundred ninety-four".