190621591540 has 24 divisors (see below), whose sum is σ = 400333070592. Its totient is φ = 76243355040.

The previous prime is 190621591519. The next prime is 190621591553. The reversal of 190621591540 is 45195126091.

It is a super-2 number, since 2×190621591540² (a number of 23 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 7 ways as a sum of consecutive naturals, for example, 27376 + ... + 618055.

It is an arithmetic number, because the mean of its divisors is an integer number (16680544608).

Almost surely, 2^190621591540 is an apocalyptic number.

190621591540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190621591540 is an abundant number, since it is smaller than the sum of its proper divisors (209711479052).

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

190621591540 is a wasteful number, since it uses less digits than its factorization.

190621591540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660207 (or 660205 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 43.

The spelling of 190621591540 in words is "one hundred ninety billion, six hundred twenty-one million, five hundred ninety-one thousand, five hundred forty".