1951678655 has 16 divisors (see below), whose sum is σ = 2362729824. Its totient is φ = 1547591040.

The previous prime is 1951678643. The next prime is 1951678661. The reversal of 1951678655 is 5568761591.

It is not a de Polignac number, because 1951678655 - 2¹² = 1951674559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1951678597 and 1951678606.

It is a congruent number.

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, 283484 + ... + 290286.

It is an arithmetic number, because the mean of its divisors is an integer number (147670614).

Almost surely, 2^1951678655 is an apocalyptic number.

1951678655 is a deficient number, since it is larger than the sum of its proper divisors (411051169).

1951678655 is a wasteful number, since it uses less digits than its factorization.

1951678655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7306.

The product of its digits is 2268000, while the sum is 53.

The square root of 1951678655 is about 44177.8072679032. The cubic root of 1951678655 is about 1249.6913702044.

The spelling of 1951678655 in words is "one billion, nine hundred fifty-one million, six hundred seventy-eight thousand, six hundred fifty-five".