261533466034701 has 64 divisors (see below), whose sum is σ = 423808575860736. Its totient is φ = 140044374144000.

The previous prime is 261533466034661. The next prime is 261533466034723. The reversal of 261533466034701 is 107430664335162.

It is not a de Polignac number, because 261533466034701 - 2⁹ = 261533466034189 is a prime.

It is a super-2 number, since 2×261533466034701² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261533466034501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 169267551 + ... + 170805651.

It is an arithmetic number, because the mean of its divisors is an integer number (6622008997824).

Almost surely, 2^{261533466034701} is an apocalyptic number.

261533466034701 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

261533466034701 is a deficient number, since it is larger than the sum of its proper divisors (162275109826035).

261533466034701 is a wasteful number, since it uses less digits than its factorization.

261533466034701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540202.

The product of its (nonzero) digits is 6531840, while the sum is 51.

The spelling of 261533466034701 in words is "two hundred sixty-one trillion, five hundred thirty-three billion, four hundred sixty-six million, thirty-four thousand, seven hundred one".