2156461692 has 192 divisors, whose sum is σ = 6773760000. Its totient is φ = 517144320.

The previous prime is 2156461687. The next prime is 2156461729. The reversal of 2156461692 is 2961646512.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 614559 + ... + 618057.

It is an arithmetic number, because the mean of its divisors is an integer number (35280000).

Almost surely, 2^2156461692 is an apocalyptic number.

2156461692 is a gapful number since it is divisible by the number (22) 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 2156461692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3386880000).

2156461692 is an abundant number, since it is smaller than the sum of its proper divisors (4617298308).

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

2156461692 is a wasteful number, since it uses less digits than its factorization.

2156461692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3576 (or 3574 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 2156461692 is about 46437.7184194056. The cubic root of 2156461692 is about 1291.9545899685.

The spelling of 2156461692 in words is "two billion, one hundred fifty-six million, four hundred sixty-one thousand, six hundred ninety-two".