1620968254 has 16 divisors (see below), whose sum is σ = 2472462720. Its totient is φ = 796907160.

The previous prime is 1620968233. The next prime is 1620968257. The reversal of 1620968254 is 4528690261.

It is a self number, because there is not a number n which added to its sum of digits gives 1620968254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620968257) 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, 11887 + ... + 58165.

It is an arithmetic number, because the mean of its divisors is an integer number (154528920).

Almost surely, 2^1620968254 is an apocalyptic number.

1620968254 is a deficient number, since it is larger than the sum of its proper divisors (851494466).

1620968254 is a wasteful number, since it uses less digits than its factorization.

1620968254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46575.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 1620968254 is about 40261.2500302710. The cubic root of 1620968254 is about 1174.6942325549.

The spelling of 1620968254 in words is "one billion, six hundred twenty million, nine hundred sixty-eight thousand, two hundred fifty-four".