5161259920 has 40 divisors (see below), whose sum is σ = 12413725560. Its totient is φ = 1993313280.

The previous prime is 5161259897. The next prime is 5161259923. The reversal of 5161259920 is 299521615.

It can be written as a sum of positive squares in 4 ways, for example, as 2141097984 + 3020161936 = 46272^2 + 54956^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (5161259923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110021 + ... + 1114660.

It is an arithmetic number, because the mean of its divisors is an integer number (310343139).

Almost surely, 2^5161259920 is an apocalyptic number.

It is an amenable number.

5161259920 is an abundant number, since it is smaller than the sum of its proper divisors (7252465640).

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

5161259920 is a wasteful number, since it uses less digits than its factorization.

5161259920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224723 (or 2224717 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 5161259920 is about 71841.9092173920. The cubic root of 5161259920 is about 1728.1651523250.

The spelling of 5161259920 in words is "five billion, one hundred sixty-one million, two hundred fifty-nine thousand, nine hundred twenty".