620139850842 has 48 divisors (see below), whose sum is σ = 1309377530592. Its totient is φ = 195776148960.

The previous prime is 620139850831. The next prime is 620139850879. The reversal of 620139850842 is 248058931026.

It is a junction number, because it is equal to n+sod(n) for n = 620139850791 and 620139850800.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7664217 + ... + 7744707.

It is an arithmetic number, because the mean of its divisors is an integer number (27278698554).

Almost surely, 2^620139850842 is an apocalyptic number.

620139850842 is an abundant number, since it is smaller than the sum of its proper divisors (689237679750).

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

620139850842 is a wasteful number, since it uses less digits than its factorization.

620139850842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84091 (or 84072 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 620139850842 in words is "six hundred twenty billion, one hundred thirty-nine million, eight hundred fifty thousand, eight hundred forty-two".