621052067978 has 8 divisors (see below), whose sum is σ = 943370230080. Its totient is φ = 306595324620.

The previous prime is 621052067959. The next prime is 621052067981. The reversal of 621052067978 is 879760250126.

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

It is a super-2 number, since 2×621052067978² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1965354488 + ... + 1965354803.

It is an arithmetic number, because the mean of its divisors is an integer number (117921278760).

Almost surely, 2^621052067978 is an apocalyptic number.

621052067978 is a deficient number, since it is larger than the sum of its proper divisors (322318162102).

621052067978 is a wasteful number, since it uses less digits than its factorization.

621052067978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930709372.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 621052067978 in words is "six hundred twenty-one billion, fifty-two million, sixty-seven thousand, nine hundred seventy-eight".