1561001464 has 16 divisors (see below), whose sum is σ = 3192957720. Its totient is φ = 709546080.

The previous prime is 1561001461. The next prime is 1561001471. The reversal of 1561001464 is 4641001651.

It is a super-2 number, since 2×1561001464² = 4873451141220286592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561001461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8869239 + ... + 8869414.

Almost surely, 2^1561001464 is an apocalyptic number.

It is an amenable number.

1561001464 is an abundant number, since it is smaller than the sum of its proper divisors (1631956256).

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

1561001464 is a wasteful number, since it uses less digits than its factorization.

1561001464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17738670 (or 17738666 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1561001464 is about 39509.5110574656. The cubic root of 1561001464 is about 1160.0261250557.

It can be divided in two parts, 15610014 and 64, that added together give a triangular number (15610078 = T₅₅₈₇).

The spelling of 1561001464 in words is "one billion, five hundred sixty-one million, one thousand, four hundred sixty-four".