1620016516620 has 144 divisors (see below), whose sum is σ = 4922322743520. Its totient is φ = 431277815808.

The previous prime is 1620016516607. The next prime is 1620016516633. The reversal of 1620016516620 is 266156100261.

1620016516620 is a `hidden beast` number, since 1 + 6 + 2 + 0 + 0 + 16 + 5 + 16 + 620 = 666.

It is an interprime number because it is at equal distance from previous prime (1620016516607) and next prime (1620016516633).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 521071626 + ... + 521074734.

It is an arithmetic number, because the mean of its divisors is an integer number (34182796830).

Almost surely, 2^{1620016516620} is an apocalyptic number.

1620016516620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620016516620 is an abundant number, since it is smaller than the sum of its proper divisors (3302306226900).

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

1620016516620 is a wasteful number, since it uses less digits than its factorization.

1620016516620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7064 (or 7059 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 1620016516620 in words is "one trillion, six hundred twenty billion, sixteen million, five hundred sixteen thousand, six hundred twenty".