1954398655 has 12 divisors (see below), whose sum is σ = 2577868776. Its totient is φ = 1421380400.

The previous prime is 1954398637. The next prime is 1954398661. The reversal of 1954398655 is 5568934591.

It is not a de Polignac number, because 1954398655 - 2⁵ = 1954398623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1954398596 and 1954398605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1614601 + ... + 1615810.

It is an arithmetic number, because the mean of its divisors is an integer number (214822398).

Almost surely, 2^1954398655 is an apocalyptic number.

1954398655 is a deficient number, since it is larger than the sum of its proper divisors (623470121).

1954398655 is a wasteful number, since it uses less digits than its factorization.

1954398655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230438 (or 3230427 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 55.

The square root of 1954398655 is about 44208.5812371309. The cubic root of 1954398655 is about 1250.2716540257.

The spelling of 1954398655 in words is "one billion, nine hundred fifty-four million, three hundred ninety-eight thousand, six hundred fifty-five".