619121634 has 16 divisors (see below), whose sum is σ = 1239156480. Its totient is φ = 206221680.

The previous prime is 619121603. The next prime is 619121663. The reversal of 619121634 is 436121916.

619121634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 619121595 and 619121604.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29074 + ... + 45645.

It is an arithmetic number, because the mean of its divisors is an integer number (77447280).

Almost surely, 2^619121634 is an apocalyptic number.

619121634 is an abundant number, since it is smaller than the sum of its proper divisors (620034846).

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

619121634 is a wasteful number, since it uses less digits than its factorization.

619121634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76105.

The product of its digits is 7776, while the sum is 33.

The square root of 619121634 is about 24882.1549307933. The cubic root of 619121634 is about 852.2990282559.

It can be divided in two parts, 61912 and 1634, that added together give a triangular number (63546 = T₃₅₆).

The spelling of 619121634 in words is "six hundred nineteen million, one hundred twenty-one thousand, six hundred thirty-four".