2991690526734 has 128 divisors (see below), whose sum is σ = 8193483648000. Its totient is φ = 787948642944.

The previous prime is 2991690526681. The next prime is 2991690526753. The reversal of 2991690526734 is 4376250961992.

2991690526734 is a `hidden beast` number, since 2 + 9 + 9 + 16 + 90 + 526 + 7 + 3 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3219532 + ... + 4043360.

It is an arithmetic number, because the mean of its divisors is an integer number (64011591000).

Almost surely, 2^{2991690526734} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2991690526734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4096741824000).

2991690526734 is an abundant number, since it is smaller than the sum of its proper divisors (5201793121266).

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

2991690526734 is a wasteful number, since it uses less digits than its factorization.

2991690526734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824599 (or 824593 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 63.

The spelling of 2991690526734 in words is "two trillion, nine hundred ninety-one billion, six hundred ninety million, five hundred twenty-six thousand, seven hundred thirty-four".