1645793004 has 24 divisors (see below), whose sum is σ = 3943973488. Its totient is φ = 533770560.

The previous prime is 1645792997. The next prime is 1645793011. The reversal of 1645793004 is 4003975461.

It is an interprime number because it is at equal distance from previous prime (1645792997) and next prime (1645793011).

It is a super-2 number, since 2×1645793004² = 5417269224030688032, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1852927 + ... + 1853814.

Almost surely, 2^1645793004 is an apocalyptic number.

It is an amenable number.

1645793004 is an abundant number, since it is smaller than the sum of its proper divisors (2298180484).

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

1645793004 is a wasteful number, since it uses less digits than its factorization.

1645793004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3706785 (or 3706783 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 1645793004 is about 40568.3744313227. The cubic root of 1645793004 is about 1180.6606001346.

The spelling of 1645793004 in words is "one billion, six hundred forty-five million, seven hundred ninety-three thousand, four".