3605991021798 has 64 divisors (see below), whose sum is σ = 7878424587264. Its totient is φ = 1091224512000.

The previous prime is 3605991021761. The next prime is 3605991021817. The reversal of 3605991021798 is 8971201995063.

It is a super-2 number, since 2×3605991021798² (a number of 26 digits) 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 31 ways as a sum of consecutive naturals, for example, 157037038 + ... + 157059998.

It is an arithmetic number, because the mean of its divisors is an integer number (123100384176).

Almost surely, 2^{3605991021798} is an apocalyptic number.

3605991021798 is an abundant number, since it is smaller than the sum of its proper divisors (4272433565466).

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

3605991021798 is a wasteful number, since it uses less digits than its factorization.

3605991021798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26141.

The product of its (nonzero) digits is 7348320, while the sum is 60.

The spelling of 3605991021798 in words is "three trillion, six hundred five billion, nine hundred ninety-one million, twenty-one thousand, seven hundred ninety-eight".