1951951950 has 72 divisors (see below), whose sum is σ = 5647664568. Its totient is φ = 480479040.

The previous prime is 1951951949. The next prime is 1951951961. The reversal of 1951951950 is 591591591.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1951951896 and 1951951905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 160984 + ... + 172683.

Almost surely, 2^1951951950 is an apocalyptic number.

1951951950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1951951950 is an abundant number, since it is smaller than the sum of its proper divisors (3695712618).

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

1951951950 is a wasteful number, since it uses less digits than its factorization.

1951951950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333698 (or 333690 counting only the distinct ones).

The product of its (nonzero) digits is 91125, while the sum is 45.

The square root of 1951951950 is about 44180.9002850779. The cubic root of 1951951950 is about 1249.7496992163.

The spelling of 1951951950 in words is "one billion, nine hundred fifty-one million, nine hundred fifty-one thousand, nine hundred fifty".