1291642900390 has 16 divisors (see below), whose sum is σ = 2328517657008. Its totient is φ = 515865952096.

The previous prime is 1291642900381. The next prime is 1291642900393. The reversal of 1291642900390 is 930092461921.

It is a self number, because there is not a number n which added to its sum of digits gives 1291642900390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291642900393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98894152 + ... + 98907211.

It is an arithmetic number, because the mean of its divisors is an integer number (145532353563).

Almost surely, 2^{1291642900390} is an apocalyptic number.

1291642900390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1291642900390 is a deficient number, since it is larger than the sum of its proper divisors (1036874756618).

1291642900390 is a wasteful number, since it uses less digits than its factorization.

1291642900390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197802023.

The product of its (nonzero) digits is 209952, while the sum is 46.

The spelling of 1291642900390 in words is "one trillion, two hundred ninety-one billion, six hundred forty-two million, nine hundred thousand, three hundred ninety".