5155394640 has 320 divisors, whose sum is σ = 18598809600. Its totient is φ = 1168128000.

The previous prime is 5155394633. The next prime is 5155394669. The reversal of 5155394640 is 464935515.

It is a junction number, because it is equal to n+sod(n) for n = 5155394592 and 5155394601.

It is a congruent number.

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, 3961990 + ... + 3963290.

It is an arithmetic number, because the mean of its divisors is an integer number (58121280).

Almost surely, 2^5155394640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5155394640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9299404800).

5155394640 is an abundant number, since it is smaller than the sum of its proper divisors (13443414960).

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

5155394640 is a wasteful number, since it uses less digits than its factorization.

5155394640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426 (or 1420 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 42.

The square root of 5155394640 is about 71801.0768721473. The cubic root of 5155394640 is about 1727.5102725292.

The spelling of 5155394640 in words is "five billion, one hundred fifty-five million, three hundred ninety-four thousand, six hundred forty".