621019470240 has 384 divisors, whose sum is σ = 2369681395200. Its totient is φ = 152865211392.

The previous prime is 621019470229. The next prime is 621019470251. The reversal of 621019470240 is 42074910126.

It is a happy number.

621019470240 is a `hidden beast` number, since 62 + 101 + 9 + 470 + 24 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (621019470229) and next prime (621019470251).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 621019470195 and 621019470204.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4480701 + ... + 4617219.

It is an arithmetic number, because the mean of its divisors is an integer number (6171045300).

Almost surely, 2^621019470240 is an apocalyptic number.

621019470240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621019470240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1184840697600).

621019470240 is an abundant number, since it is smaller than the sum of its proper divisors (1748661924960).

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

621019470240 is a wasteful number, since it uses less digits than its factorization.

621019470240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136568 (or 136542 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 621019470240 in words is "six hundred twenty-one billion, nineteen million, four hundred seventy thousand, two hundred forty".