1021346577990 has 48 divisors (see below), whose sum is σ = 2811707054208. Its totient is φ = 256337964288.

The previous prime is 1021346577989. The next prime is 1021346578009. The reversal of 1021346577990 is 997756431201.

1021346577990 is a `hidden beast` number, since 1 + 0 + 21 + 3 + 46 + 577 + 9 + 9 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 333771862 + ... + 333774921.

It is an arithmetic number, because the mean of its divisors is an integer number (58577230296).

Almost surely, 2^{1021346577990} is an apocalyptic number.

1021346577990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021346577990 is an abundant number, since it is smaller than the sum of its proper divisors (1790360476218).

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

1021346577990 is a wasteful number, since it uses less digits than its factorization.

1021346577990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667546813 (or 667546810 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 1021346577990 in words is "one trillion, twenty-one billion, three hundred forty-six million, five hundred seventy-seven thousand, nine hundred ninety".