1653611990 has 32 divisors (see below), whose sum is σ = 3168396000. Its totient is φ = 619584768.

The previous prime is 1653611923. The next prime is 1653612019. The reversal of 1653611990 is 991163561.

1653611990 = 15² + 16² + ... + 1705².

It is a super-2 number, since 2×1653611990² = 5468865226943520200, which contains 22 as substring.

It is a congruent number.

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, 31985 + ... + 65804.

It is an arithmetic number, because the mean of its divisors is an integer number (99012375).

Almost surely, 2^1653611990 is an apocalyptic number.

1653611990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1653611990 is a deficient number, since it is larger than the sum of its proper divisors (1514784010).

1653611990 is a wasteful number, since it uses less digits than its factorization.

1653611990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97904.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 1653611990 is about 40664.6282412615. The cubic root of 1653611990 is about 1182.5273775782.

The spelling of 1653611990 in words is "one billion, six hundred fifty-three million, six hundred eleven thousand, nine hundred ninety".