1201619610 has 80 divisors (see below), whose sum is σ = 3237518592. Its totient is φ = 319788000.

The previous prime is 1201619591. The next prime is 1201619623. The reversal of 1201619610 is 169161021.

1201619610 is a `hidden beast` number, since 1 + 20 + 16 + 19 + 610 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 509935 + ... + 512285.

Almost surely, 2^1201619610 is an apocalyptic number.

1201619610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201619610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1618759296).

1201619610 is an abundant number, since it is smaller than the sum of its proper divisors (2035898982).

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

1201619610 is a wasteful number, since it uses less digits than its factorization.

1201619610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001 (or 2992 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1201619610 is about 34664.3853255759. The cubic root of 1201619610 is about 1063.1364354938.

It can be divided in two parts, 12016 and 19610, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 1201619610 in words is "one billion, two hundred one million, six hundred nineteen thousand, six hundred ten".