1953778742 has 16 divisors (see below), whose sum is σ = 2947998240. Its totient is φ = 971129088.

The previous prime is 1953778727. The next prime is 1953778777. The reversal of 1953778742 is 2478773591.

It is a super-2 number, since 2×1953778742² = 7634502745382205128, which contains 22 as substring.

It is a congruent number.

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, 258278 + ... + 265734.

It is an arithmetic number, because the mean of its divisors is an integer number (184249890).

Almost surely, 2^1953778742 is an apocalyptic number.

1953778742 is a deficient number, since it is larger than the sum of its proper divisors (994219498).

1953778742 is a wasteful number, since it uses less digits than its factorization.

1953778742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8215.

The product of its digits is 2963520, while the sum is 53.

The square root of 1953778742 is about 44201.5694517740. The cubic root of 1953778742 is about 1250.1394494025.

The spelling of 1953778742 in words is "one billion, nine hundred fifty-three million, seven hundred seventy-eight thousand, seven hundred forty-two".