1620345454 has 32 divisors (see below), whose sum is σ = 3001130496. Its totient is φ = 638932320.

The previous prime is 1620345439. The next prime is 1620345547. The reversal of 1620345454 is 4545430261.

It is a super-2 number, since 2×1620345454² = 5251038780596932232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42289 + ... + 70915.

It is an arithmetic number, because the mean of its divisors is an integer number (93785328).

Almost surely, 2^1620345454 is an apocalyptic number.

1620345454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1620345454 is a deficient number, since it is larger than the sum of its proper divisors (1380785042).

1620345454 is a wasteful number, since it uses less digits than its factorization.

1620345454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28960.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 1620345454 is about 40253.5148030579. The cubic root of 1620345454 is about 1174.5437683116.

The spelling of 1620345454 in words is "one billion, six hundred twenty million, three hundred forty-five thousand, four hundred fifty-four".