1157621645 has 16 divisors (see below), whose sum is σ = 1484091840. Its totient is φ = 864255744.

The previous prime is 1157621629. The next prime is 1157621651. The reversal of 1157621645 is 5461267511.

It is a cyclic number.

It is not a de Polignac number, because 1157621645 - 2⁴ = 1157621629 is a prime.

It is a super-3 number, since 3×1157621645³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1157621599 and 1157621608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84572 + ... + 97301.

It is an arithmetic number, because the mean of its divisors is an integer number (92755740).

Almost surely, 2^1157621645 is an apocalyptic number.

It is an amenable number.

1157621645 is a deficient number, since it is larger than the sum of its proper divisors (326470195).

1157621645 is a wasteful number, since it uses less digits than its factorization.

1157621645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181964.

The product of its digits is 50400, while the sum is 38.

The square root of 1157621645 is about 34023.8393630113. The cubic root of 1157621645 is about 1049.9989856377.

The spelling of 1157621645 in words is "one billion, one hundred fifty-seven million, six hundred twenty-one thousand, six hundred forty-five".