1561622070 has 16 divisors (see below), whose sum is σ = 3747893040. Its totient is φ = 416432544.

The previous prime is 1561622011. The next prime is 1561622071. The reversal of 1561622070 is 702261651.

It is a super-2 number, since 2×1561622070² = 4877326979022169800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 52054069 = 1561622070 / (1 + 5 + 6 + 1 + 6 + 2 + 2 + 0 + 7 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561622071) 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, 26027005 + ... + 26027064.

It is an arithmetic number, because the mean of its divisors is an integer number (234243315).

Almost surely, 2^1561622070 is an apocalyptic number.

1561622070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1561622070 is an abundant number, since it is smaller than the sum of its proper divisors (2186270970).

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

1561622070 is a wasteful number, since it uses less digits than its factorization.

1561622070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52054079.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1561622070 is about 39517.3641580508. The cubic root of 1561622070 is about 1160.1798348813.

The spelling of 1561622070 in words is "one billion, five hundred sixty-one million, six hundred twenty-two thousand, seventy".