1661461536 has 96 divisors (see below), whose sum is σ = 5246760960. Its totient is φ = 449715456.

The previous prime is 1661461499. The next prime is 1661461541. The reversal of 1661461536 is 6351641661.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 1661461494 and 1661461503.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52296 + ... + 77831.

It is an arithmetic number, because the mean of its divisors is an integer number (54653760).

Almost surely, 2^1661461536 is an apocalyptic number.

1661461536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1661461536 is an abundant number, since it is smaller than the sum of its proper divisors (3585299424).

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

1661461536 is a wasteful number, since it uses less digits than its factorization.

1661461536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130166 (or 130158 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 1661461536 is about 40761.0296238944. The cubic root of 1661461536 is about 1184.3955413911.

The spelling of 1661461536 in words is "one billion, six hundred sixty-one million, four hundred sixty-one thousand, five hundred thirty-six".