1625196780 has 36 divisors (see below), whose sum is σ = 4929764112. Its totient is φ = 433385760.

The previous prime is 1625196763. The next prime is 1625196791. The reversal of 1625196780 is 876915261.

1625196780 is a `hidden beast` number, since 1 + 62 + 519 + 6 + 78 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

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, 4514256 + ... + 4514615.

It is an arithmetic number, because the mean of its divisors is an integer number (136937892).

Almost surely, 2^1625196780 is an apocalyptic number.

1625196780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1625196780 is an abundant number, since it is smaller than the sum of its proper divisors (3304567332).

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

1625196780 is a wasteful number, since it uses less digits than its factorization.

1625196780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9028886 (or 9028881 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 1625196780 is about 40313.7294231134. The cubic root of 1625196780 is about 1175.7147979080.

The spelling of 1625196780 in words is "one billion, six hundred twenty-five million, one hundred ninety-six thousand, seven hundred eighty".