1561073416 has 128 divisors (see below), whose sum is σ = 3657830400. Its totient is φ = 609408000.

The previous prime is 1561073413. The next prime is 1561073429. The reversal of 1561073416 is 6143701651.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (1561073413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6219291 + ... + 6219541.

It is an arithmetic number, because the mean of its divisors is an integer number (28576800).

Almost surely, 2^1561073416 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 1561073416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1828915200).

1561073416 is an abundant number, since it is smaller than the sum of its proper divisors (2096756984).

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

1561073416 is a wasteful number, since it uses less digits than its factorization.

1561073416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 1561073416 is about 39510.4216125315. The cubic root of 1561073416 is about 1160.0439479981.

The spelling of 1561073416 in words is "one billion, five hundred sixty-one million, seventy-three thousand, four hundred sixteen".