1955216625 has 32 divisors (see below), whose sum is σ = 3257324928. Its totient is φ = 1041550400.

The previous prime is 1955216621. The next prime is 1955216677. The reversal of 1955216625 is 5266125591.

It is not a de Polignac number, because 1955216625 - 2² = 1955216621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1955216621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 377302 + ... + 382448.

It is an arithmetic number, because the mean of its divisors is an integer number (101791404).

Almost surely, 2^1955216625 is an apocalyptic number.

1955216625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1955216625 is a deficient number, since it is larger than the sum of its proper divisors (1302108303).

1955216625 is a wasteful number, since it uses less digits than its factorization.

1955216625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6178 (or 6168 counting only the distinct ones).

The product of its digits is 162000, while the sum is 42.

The square root of 1955216625 is about 44217.8315275636. The cubic root of 1955216625 is about 1250.4460541430.

The spelling of 1955216625 in words is "one billion, nine hundred fifty-five million, two hundred sixteen thousand, six hundred twenty-five".