15461770640 has 160 divisors (see below), whose sum is σ = 38810016000. Its totient is φ = 5707874304.

The previous prime is 15461770627. The next prime is 15461770661. The reversal of 15461770640 is 4607716451.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16824101 + ... + 16825019.

It is an arithmetic number, because the mean of its divisors is an integer number (242562600).

Almost surely, 2^15461770640 is an apocalyptic number.

15461770640 is a gapful number since it is divisible by the number (10) 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 15461770640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19405008000).

15461770640 is an abundant number, since it is smaller than the sum of its proper divisors (23348245360).

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

15461770640 is a wasteful number, since it uses less digits than its factorization.

15461770640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1171 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 15461770640 in words is "fifteen billion, four hundred sixty-one million, seven hundred seventy thousand, six hundred forty".