616400520420 has 48 divisors (see below), whose sum is σ = 1726551586368. Its totient is φ = 164313459840.

The previous prime is 616400520409. The next prime is 616400520473. The reversal of 616400520420 is 24025004616.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1709554 + ... + 2038473.

It is an arithmetic number, because the mean of its divisors is an integer number (35969824716).

Almost surely, 2^616400520420 is an apocalyptic number.

616400520420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

616400520420 is an abundant number, since it is smaller than the sum of its proper divisors (1110151065948).

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

616400520420 is a wasteful number, since it uses less digits than its factorization.

616400520420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750780 (or 3750778 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 616400520420 in words is "six hundred sixteen billion, four hundred million, five hundred twenty thousand, four hundred twenty".