1620642443354 has 8 divisors (see below), whose sum is σ = 2651960361888. Its totient is φ = 736655656060.

The previous prime is 1620642443353. The next prime is 1620642443359. The reversal of 1620642443354 is 4533442460261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1620642443353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36832782782 + ... + 36832782825.

It is an arithmetic number, because the mean of its divisors is an integer number (331495045236).

Almost surely, 2^{1620642443354} is an apocalyptic number.

1620642443354 is a deficient number, since it is larger than the sum of its proper divisors (1031317918534).

1620642443354 is a wasteful number, since it uses less digits than its factorization.

1620642443354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73665565620.

The product of its (nonzero) digits is 1658880, while the sum is 44.

The spelling of 1620642443354 in words is "one trillion, six hundred twenty billion, six hundred forty-two million, four hundred forty-three thousand, three hundred fifty-four".