620777778036 has 48 divisors (see below), whose sum is σ = 1566775043904. Its totient is φ = 190167088896.

The previous prime is 620777778031. The next prime is 620777778037. The reversal of 620777778036 is 630877777026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620777778031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8729665 + ... + 8800488.

It is an arithmetic number, because the mean of its divisors is an integer number (32641146748).

Almost surely, 2^620777778036 is an apocalyptic number.

It is an amenable number.

620777778036 is an abundant number, since it is smaller than the sum of its proper divisors (945997265868).

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

620777778036 is a wasteful number, since it uses less digits than its factorization.

620777778036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17530400 (or 17530398 counting only the distinct ones).

The product of its (nonzero) digits is 29042496, while the sum is 60.

The spelling of 620777778036 in words is "six hundred twenty billion, seven hundred seventy-seven million, seven hundred seventy-eight thousand, thirty-six".