628943415531 has 8 divisors (see below), whose sum is σ = 838669702464. Its totient is φ = 419256369480.

The previous prime is 628943415509. The next prime is 628943415533. The reversal of 628943415531 is 135514349826.

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

It is not a de Polignac number, because 628943415531 - 2⁶ = 628943415467 is a prime.

It is a super-2 number, since 2×628943415531² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (628943415533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9772801 + ... + 9836946.

It is an arithmetic number, because the mean of its divisors is an integer number (104833712808).

Almost surely, 2^628943415531 is an apocalyptic number.

628943415531 is a deficient number, since it is larger than the sum of its proper divisors (209726286933).

628943415531 is a wasteful number, since it uses less digits than its factorization.

628943415531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19620441.

The product of its digits is 3110400, while the sum is 51.

The spelling of 628943415531 in words is "six hundred twenty-eight billion, nine hundred forty-three million, four hundred fifteen thousand, five hundred thirty-one".