628781045697 has 48 divisors (see below), whose sum is σ = 1060951357440. Its totient is φ = 351439541856.

The previous prime is 628781045677. The next prime is 628781045699. The reversal of 628781045697 is 796540187826.

628781045697 is a `hidden beast` number, since 6 + 2 + 87 + 8 + 10 + 456 + 97 = 666.

It is not a de Polignac number, because 628781045697 - 2¹² = 628781041601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (628781045699) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57823 + ... + 1122900.

It is an arithmetic number, because the mean of its divisors is an integer number (22103153280).

Almost surely, 2^628781045697 is an apocalyptic number.

It is an amenable number.

628781045697 is a deficient number, since it is larger than the sum of its proper divisors (432170311743).

628781045697 is a wasteful number, since it uses less digits than its factorization.

628781045697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180922 (or 1180919 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 63.

The spelling of 628781045697 in words is "six hundred twenty-eight billion, seven hundred eighty-one million, forty-five thousand, six hundred ninety-seven".