10621157481 has 63 divisors (see below), whose sum is σ = 17554324333. Its totient is φ = 6418514520.

The previous prime is 10621157479. The next prime is 10621157497. The reversal of 10621157481 is 18475112601.

The square root of 10621157481 is 103059.

It is a perfect power (a square), and thus also a powerful number.

10621157481 is a `hidden beast` number, since 1 + 0 + 6 + 2 + 1 + 1 + 574 + 81 = 666.

It is not a de Polignac number, because 10621157481 - 2¹ = 10621157479 is a prime.

It is a super-2 number, since 2×10621157481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10621157401) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 30608350 + ... + 30608696.

Almost surely, 2^10621157481 is an apocalyptic number.

10621157481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10621157481 is the 103059-th square number.

10621157481 is the 51530-th centered octagonal number.

It is an amenable number.

10621157481 is a deficient number, since it is larger than the sum of its proper divisors (6933166852).

10621157481 is an frugal number, since it uses more digits than its factorization.

10621157481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

Multiplying 10621157481 by its sum of digits (36), we get a square (382361669316 = 618354²).

The spelling of 10621157481 in words is "ten billion, six hundred twenty-one million, one hundred fifty-seven thousand, four hundred eighty-one".