1012781157766 has 8 divisors (see below), whose sum is σ = 1736196270480. Its totient is φ = 434049067608.

The previous prime is 1012781157727. The next prime is 1012781157823. The reversal of 1012781157766 is 6677511872101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1012781157766² (a number of 25 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 3 ways as a sum of consecutive naturals, for example, 36170755621 + ... + 36170755648.

It is an arithmetic number, because the mean of its divisors is an integer number (217024533810).

Almost surely, 2^{1012781157766} is an apocalyptic number.

1012781157766 is a deficient number, since it is larger than the sum of its proper divisors (723415112714).

1012781157766 is an equidigital number, since it uses as much as digits as its factorization.

1012781157766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72341511278.

The product of its (nonzero) digits is 987840, while the sum is 52.

The spelling of 1012781157766 in words is "one trillion, twelve billion, seven hundred eighty-one million, one hundred fifty-seven thousand, seven hundred sixty-six".