1995525690 has 32 divisors (see below), whose sum is σ = 4800404736. Its totient is φ = 530902080.

The previous prime is 1995525683. The next prime is 1995525731. The reversal of 1995525690 is 965255991.

It is a super-2 number, since 2×1995525690² = 7964245558899952200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64237 + ... + 90096.

It is an arithmetic number, because the mean of its divisors is an integer number (150012648).

Almost surely, 2^1995525690 is an apocalyptic number.

1995525690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1995525690 is an abundant number, since it is smaller than the sum of its proper divisors (2804879046).

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

1995525690 is a wasteful number, since it uses less digits than its factorization.

1995525690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154774.

The product of its (nonzero) digits is 1093500, while the sum is 51.

The square root of 1995525690 is about 44671.3072340624. The cubic root of 1995525690 is about 1258.9808021605.

The spelling of 1995525690 in words is "one billion, nine hundred ninety-five million, five hundred twenty-five thousand, six hundred ninety".