1061640025 has 12 divisors (see below), whose sum is σ = 1317326400. Its totient is φ = 848736080.

The previous prime is 1061640023. The next prime is 1061640031. The reversal of 1061640025 is 5200461601.

It is not a de Polignac number, because 1061640025 - 2¹ = 1061640023 is a prime.

It is a super-2 number, since 2×1061640025² = 2254159085364001250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1061640023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25356 + ... + 52594.

It is an arithmetic number, because the mean of its divisors is an integer number (109777200).

Almost surely, 2^1061640025 is an apocalyptic number.

It is an amenable number.

1061640025 is a deficient number, since it is larger than the sum of its proper divisors (255686375).

1061640025 is a wasteful number, since it uses less digits than its factorization.

1061640025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28808 (or 28803 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1061640025 is about 32582.8179413629. The cubic root of 1061640025 is about 1020.1383975351.

The spelling of 1061640025 in words is "one billion, sixty-one million, six hundred forty thousand, twenty-five".